{"id":754,"date":"2026-07-16T09:08:16","date_gmt":"2026-07-16T07:08:16","guid":{"rendered":"https:\/\/www-new.ias.u-psud.fr\/?page_id=754"},"modified":"2026-09-23T11:32:13","modified_gmt":"2026-09-23T09:32:13","slug":"astrochimie-et-origines","status":"publish","type":"page","link":"https:\/\/www.ias.u-psud.fr\/index.php\/astrochimie-et-origines\/","title":{"rendered":"Astrochimie et origines"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"754\" class=\"elementor elementor-754\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ef3edb0 e-con-full e-flex e-con e-parent\" data-id=\"ef3edb0\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-26f6f53 e-con-full e-flex e-con e-child\" data-id=\"26f6f53\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f9c99b8 e-con-full e-flex e-con e-child\" data-id=\"f9c99b8\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b8f0ecb e-con-full e-flex e-con e-child\" data-id=\"b8f0ecb\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-65845c7f e-con-full e-flex e-con e-parent\" data-id=\"65845c7f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-388502ff e-flex e-con-boxed e-con e-child\" data-id=\"388502ff\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-307741f elementor-nav-menu--dropdown-tablet elementor-nav-menu__text-align-aside elementor-nav-menu--toggle elementor-nav-menu--burger elementor-widget elementor-widget-nav-menu\" data-id=\"307741f\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;layout&quot;:&quot;horizontal&quot;,&quot;submenu_icon&quot;:{&quot;value&quot;:&quot;&lt;svg aria-hidden=\\&quot;true\\&quot; class=\\&quot;e-font-icon-svg e-fas-caret-down\\&quot; viewBox=\\&quot;0 0 320 512\\&quot; xmlns=\\&quot;http:\\\/\\\/www.w3.org\\\/2000\\\/svg\\&quot;&gt;&lt;path d=\\&quot;M31.3 192h257.3c17.8 0 26.7 21.5 14.1 34.1L174.1 354.8c-7.8 7.8-20.5 7.8-28.3 0L17.2 226.1C4.6 213.5 13.5 192 31.3 192z\\&quot;&gt;&lt;\\\/path&gt;&lt;\\\/svg&gt;&quot;,&quot;library&quot;:&quot;fa-solid&quot;},&quot;toggle&quot;:&quot;burger&quot;}\" data-widget_type=\"nav-menu.default\">\n\t\t\t\t\t\t\t\t<nav aria-label=\"Menu\" class=\"elementor-nav-menu--main elementor-nav-menu__container elementor-nav-menu--layout-horizontal e--pointer-underline e--animation-fade\">\n\t\t\t\t<ul id=\"menu-1-307741f\" class=\"elementor-nav-menu\"><li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-762\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/astrochimie-et-origines\/#presentation\" class=\"elementor-item elementor-item-anchor menu-link\">Pr\u00e9sentation<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-763\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/astrochimie-et-origines\/#equipe\" class=\"elementor-item elementor-item-anchor menu-link\">L&rsquo;\u00e9quipe<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-764\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/astrochimie-et-origines\/#themes-scientifiques\" class=\"elementor-item elementor-item-anchor menu-link\">Th\u00e8mes scientifiques<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-830\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/astrochimie-et-origines\/#moyens-techniques\" class=\"elementor-item elementor-item-anchor menu-link\">Moyens techniques\u200b<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t<div class=\"elementor-menu-toggle\" role=\"button\" tabindex=\"0\" aria-label=\"Menu Toggle\" aria-expanded=\"false\">\n\t\t\t<svg aria-hidden=\"true\" role=\"presentation\" class=\"elementor-menu-toggle__icon--open e-font-icon-svg e-eicon-menu-bar\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M104 333H896C929 333 958 304 958 271S929 208 896 208H104C71 208 42 237 42 271S71 333 104 333ZM104 583H896C929 583 958 554 958 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menu-item-762\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/astrochimie-et-origines\/#presentation\" class=\"elementor-item elementor-item-anchor menu-link\" tabindex=\"-1\">Pr\u00e9sentation<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-763\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/astrochimie-et-origines\/#equipe\" class=\"elementor-item elementor-item-anchor menu-link\" tabindex=\"-1\">L&rsquo;\u00e9quipe<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-764\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/astrochimie-et-origines\/#themes-scientifiques\" class=\"elementor-item elementor-item-anchor menu-link\" tabindex=\"-1\">Th\u00e8mes scientifiques<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-830\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/astrochimie-et-origines\/#moyens-techniques\" class=\"elementor-item elementor-item-anchor menu-link\" tabindex=\"-1\">Moyens techniques\u200b<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-197a509 elementor-widget elementor-widget-menu-anchor\" data-id=\"197a509\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"menu-anchor.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-menu-anchor\" id=\"presentation\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-512c367d e-flex e-con-boxed e-con e-parent\" data-id=\"512c367d\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-2d2d7b00 e-con-full e-flex e-con e-child\" data-id=\"2d2d7b00\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e05fcee elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"e05fcee\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeIn&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pr\u00e9sentation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-626d2469 elementor-widget elementor-widget-text-editor\" data-id=\"626d2469\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>L&rsquo;\u00e9quipe <strong>Astrochimie et Origines<\/strong>\u00a0est une \u00e9quipe essentiellement exp\u00e9rimentale qui combine des analyses et des simulations en laboratoire \u00e0 l&rsquo;interpr\u00e9tation, \u00e0 la mod\u00e9lisation et aux observations pour l&rsquo;\u00e9tude de la mati\u00e8re extraterrestre solide issue des petits corps du syst\u00e8me solaire et pour l\u2019\u00e9tude des surfaces des corps glac\u00e9s (les objets transneptuniens).<\/p><p>Les travaux de l\u2019\u00e9quipe ont pour sp\u00e9cificit\u00e9 d\u2019allier exp\u00e9riences et mesures en laboratoire et donn\u00e9es observationnelles issues de diff\u00e9rents instruments spatiaux, afin d\u2019aider \u00e0 l\u2019interpr\u00e9tation de ces derni\u00e8res.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3a03562c e-con-full e-flex e-con e-child\" data-id=\"3a03562c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7027b0b6 elementor-widget__width-inherit elementor-widget elementor-widget-image\" data-id=\"7027b0b6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"387\" height=\"275\" src=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-01-1.png\" class=\"attachment-large size-large wp-image-767\" alt=\"\" srcset=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-01-1.png 387w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-01-1-300x213.png 300w\" sizes=\"(max-width: 387px) 100vw, 387px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d3d3a76 e-con e-atomic-element e-flexbox-base e-d3d3a76-dfb21b5 \" data-id=\"d3d3a76\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"d3d3a76\">\n    \t\t<div class=\"elementor-element elementor-element-6469fa6 elementor-blockquote--align-center elementor-blockquote--skin-border elementor-widget elementor-widget-blockquote\" data-id=\"6469fa6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"blockquote.default\">\n\t\t\t\t\t\t\t<blockquote class=\"elementor-blockquote\">\n\t\t\t<p class=\"elementor-blockquote__content\">\n\t\t\t\t\u00ab Analyser la mati\u00e8re extraterrestre (m\u00e9t\u00e9orites, grains com\u00e9taires, ast\u00e9ro\u00efdes, poussi\u00e8re interstellaire) pour comprendre son \u00e9volution et son r\u00f4le dans l\u2019origine du syst\u00e8me solaire et de la vie. \u00bb\n\t\t\t<\/p>\n\t\t\t\t\t\t\t<div class=\"e-q-footer\">\n\t\t\t\t\t\t\t\t\t\t\t<cite class=\"elementor-blockquote__author\">Zahia Djouadi, Responsable de l'\u00e9quipe A&amp;O<\/cite>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/blockquote>\n\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-ecdd970 e-con e-atomic-element e-flexbox-base e-cdb693a \" data-id=\"ecdd970\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"ecdd970\">\n    \t\t<div class=\"elementor-element elementor-element-5e178d7 elementor-widget elementor-widget-text-editor\" data-id=\"5e178d7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Trois grands types d\u2019exp\u00e9riences sont men\u00e9s par les membres de l\u2019\u00e9quipe A&amp;O :<\/strong><\/p><ul><li>Les mesures de caract\u00e9risations physico-chimiques de diff\u00e9rents types d\u2019\u00e9chantillons.<\/li><li>Les simulations exp\u00e9rimentales dont le but est de reproduire en laboratoire un processus ou un environnement astrophysique et d\u2019en \u00e9tudier les effets physiques et\/ou chimiques sur diff\u00e9rents types de mati\u00e8res solides.<\/li><li>Les exp\u00e9riences de production d&rsquo;analogues de mati\u00e8re extraterrestre (glaces, min\u00e9raux, mat\u00e9riaux organiques).<\/li><\/ul><p>Les m\u00e9thodes de caract\u00e9risation physico-chimique de l\u2019\u00e9quipe reposent principalement sur des techniques de spectroscopie, de microscopie et d\u2019imagerie utilis\u00e9es dans le but d\u2019analyser divers \u00e9chantillons extraterrestres : m\u00e9t\u00e9orites, poussi\u00e8res interplan\u00e9taires (commun\u00e9ment appel\u00e9es IDPs pour <em>Interplanetary Dust Particles<\/em>) collect\u00e9es dans la stratosph\u00e8re et des grains com\u00e9taires et ast\u00e9ro\u00efdaux collect\u00e9s par des sondes spatiales et ramen\u00e9s sur Terre.<\/p><p>Pour produire et\/ou analyser une large gamme d&rsquo;\u00e9chantillons d&rsquo;int\u00e9r\u00eat astrophysique,\u00a0 l\u2019\u00e9quipe A&amp;O a fait le choix strat\u00e9gique de d\u00e9velopper des analyses spectroscopiques et physico-chimiques sur des dispositifs se trouvant \u00e0 l\u2019IAS et de s&rsquo;appuyer fortement sur des\u00a0 collaborations interdisciplinaires, nationales et internationales, pour \u00e9tendre ses capacit\u00e9s d&rsquo;analyses aupr\u00e8s de plateformes nationales, de grands acc\u00e9l\u00e9rateurs, et des synchrotrons (l\u2019\u00e9quipe a d\u00e9velopp\u00e9 un partenariat de longue date avec <a href=\"https:\/\/www.synchrotron-soleil.fr\/fr\/lignes-de-lumiere\/smis\">la ligne SMIS du synchrotron SOLEIL<\/a>, elle b\u00e9n\u00e9ficie ainsi d\u2019un acc\u00e8s garanti aux instruments de la ligne et d\u00e9veloppe \u00e9galement des collaborations avec d\u2019autres lignes).<\/p><p>Les donn\u00e9es spectroscopiques d\u2019int\u00e9r\u00eat obtenues en laboratoire par l\u2019\u00e9quipe A&amp;O alimentent r\u00e9guli\u00e8rement la base de donn\u00e9es <a href=\"https:\/\/www.sshade.eu\/db\/daysy\">DAYSY<\/a> (Database for AstrochemistrY and SpectroscopY) qui fait partie de l\u2019architecture <a href=\"https:\/\/www.sshade.eu\/db\/daysy\">SSHADE<\/a> (Solid Spectroscopy Hosting Architecture of Databases and Expertise), labellis\u00e9e Europlanet (responsable B. Schmitt, <a href=\"https:\/\/ipag.osug.fr\/\">IPAG<\/a>, <a href=\"https:\/\/www.osug.fr\/\">OSUG<\/a>).<\/p><p>Cette base de donn\u00e9es permet d\u2019assurer l&rsquo;archivage, la tra\u00e7abilit\u00e9 et surtout l\u2019acc\u00e8s public \u00e0 une partie importante des donn\u00e9es exp\u00e9rimentales produites par l\u2019\u00e9quipe.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-b62ac5f e-con e-atomic-element e-flexbox-base e-f2cf49c \" data-id=\"b62ac5f\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"b62ac5f\">\n    \t\t<div class=\"elementor-element elementor-element-9233f93 elementor-widget elementor-widget-menu-anchor\" data-id=\"9233f93\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"menu-anchor.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-menu-anchor\" id=\"equipe\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-f8a1f8a e-con-full e-flex e-con e-parent\" data-id=\"f8a1f8a\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-0a46df0 e-con-full e-flex e-con e-child\" data-id=\"0a46df0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cb8b757 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"cb8b757\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeIn&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">L'\u00e9quipe<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4774190 elementor-widget elementor-widget-text-editor\" data-id=\"4774190\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=aleon\">Alice Al\u00e9on<\/a>, Ma\u00eetre de conf\u00e9rences<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=amano\">Kana Amano<\/a>, post-doctorante<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=baklouti\">Donia Baklouti<\/a>, Ma\u00eetre de conf\u00e9rences<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=brunetto\">Rosario Brunetto<\/a>, Charg\u00e9 de Recherches<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=cryan\">Sasha Cryan<\/a>, Doctorante<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=dionnet\">Z\u00e9lia Dionnet<\/a>, Astronome adjoint<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=djouadi\">Zahia Djouadi<\/a>, Ma\u00eetre de conf\u00e9rences (responsable de l&rsquo;\u00e9quipe)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=lantz\">Cateline Lantz<\/a>, Astronome Adjoint<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=nardelli\">Laura Nardelli<\/a>, Doctorante<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2fae1ae elementor-widget elementor-widget-menu-anchor\" data-id=\"2fae1ae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"menu-anchor.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-menu-anchor\" id=\"themes-scientifiques\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7d5cae5 e-con e-atomic-element e-flexbox-base e-29e8546 \" data-id=\"7d5cae5\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"7d5cae5\">\n    \t\t<div class=\"elementor-element elementor-element-13ef93d elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"13ef93d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeIn&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Th\u00e8mes scientifiques<\/h2>\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-a02e41c e-con e-atomic-element e-flexbox-base e-a02e41c-91be703 \" data-id=\"a02e41c\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"a02e41c\">\n    \t\t<div class=\"elementor-element elementor-element-5782c25 elementor-widget elementor-widget-text-editor\" data-id=\"5782c25\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Les objectifs scientifiques de l\u2019\u00e9quipe A&amp;O s&rsquo;inscrivent dans le contexte des instruments d&rsquo;observation et des missions d&rsquo;exploration du Syst\u00e8me Solaire. Les membres de l\u2019\u00e9quipe de formations diff\u00e9rentes (astrophysique, physique, chimie et g\u00e9ologie) utilisent des m\u00e9thodes analytiques vari\u00e9es, permettant ainsi une \u00e9tude la plus pouss\u00e9e possible des solides extraterrestres. L\u2019analyse d\u2019\u00e9chantillons extraterrestres divers et les travaux sur des analogues de synth\u00e8ses en laboratoire, coupl\u00e9s aux observations \u00ab in-situ \u00bb (missions Rosetta, Hayabusa2, OSIRIS-Rex) permettent en effet de contraindre les liens de filiation entre les mati\u00e8res interstellaire, com\u00e9taire\/ast\u00e9ro\u00efdale et interplan\u00e9taire.<\/p><p>\u00a0<\/p><p><b>Analyse de cosmo-mat\u00e9riaux dits primitifs<br \/><\/b><span style=\"font-style: inherit; font-weight: inherit;\">Les corps primitifs, qui ont peu ou pas du tout \u00e9volu\u00e9 depuis les d\u00e9buts de notre Syst\u00e8me Solaire, il y a pr\u00e8s de 4.6 milliards d\u2019ann\u00e9es, desquels sont issus les cosmo-mat\u00e9riaux disponibles en laboratoire pr\u00e9sentent un assemblage complexe et d\u2019importantes h\u00e9t\u00e9rog\u00e9n\u00e9it\u00e9s physico-chimiques jusqu\u2019aux \u00e9chelles microm\u00e9trique et nanom\u00e9trique. Historiquement, l\u2019\u00e9quipe s\u2019est tr\u00e8s t\u00f4t impliqu\u00e9e et investie dans l\u2019analyse d\u2019\u00e9chantillons extraterrestres primitifs, de minuscules particules interplan\u00e9taires, appel\u00e9es IDPs (<\/span><em style=\"font-weight: inherit;\">Interplanetary Dust Particles<\/em><span style=\"font-style: inherit; font-weight: inherit;\">) et des \u00e9chantillons de m\u00e9t\u00e9orites. Elle a particuli\u00e8rement utilis\u00e9 les microspectroscopies infrarouge (l\u2019unique observable pouvant \u00eatre directement reli\u00e9e aux donn\u00e9es mesur\u00e9es par les t\u00e9lescopes sol et spatiaux et par les sondes spatiales) et Raman (pour l\u2019\u00e9tude de la composante organique aromatique). Elle a ainsi particip\u00e9 aux groupes pr\u00e9liminaires des analyses des \u00e9chantillons com\u00e9taires rapport\u00e9s en 2006 par la mission <\/span><a style=\"font-style: inherit; font-weight: inherit; background-color: #ffffff;\" href=\"https:\/\/science.nasa.gov\/mission\/stardust\/\">Stardust<\/a><span style=\"font-style: inherit; font-weight: inherit;\"> de la NASA et a \u00e9t\u00e9 s\u00e9lectionn\u00e9e en 2018 pour participer aux analyses pr\u00e9liminaires des \u00e9chantillons ast\u00e9ro\u00efdaux rapport\u00e9s en fin 2020 par la mission <\/span><a style=\"font-style: inherit; font-weight: inherit; background-color: #ffffff;\" href=\"https:\/\/www.ias.universite-paris-saclay.fr\/fr\/content\/hayabusa-2micromega-curation\">Hayabusa2<\/a><span style=\"font-style: inherit; font-weight: inherit;\"> de la <\/span><a style=\"font-style: inherit; font-weight: inherit; background-color: #ffffff;\" href=\"https:\/\/global.jaxa.jp\/\">JAXA<\/a><span style=\"font-style: inherit; font-weight: inherit;\">.<\/span><\/p><p>Ces derni\u00e8res ann\u00e9es, l\u2019\u00e9quipe A&amp;O a d\u00e9velopp\u00e9 diff\u00e9rents protocoles analytiques sp\u00e9cifiquement optimis\u00e9s pour ces mat\u00e9riaux pr\u00e9cieux, fragiles et rares dans une logique de cha\u00eene analytique allant des techniques les moins destructives aux plus destructives afin d\u2019extraire un maximum d\u2019informations de ses analyses et \u00e0 diff\u00e9rentes \u00e9chelles. La technique d\u2019analyse phare utilis\u00e9e est la spectroscopie infrarouge (micro-spectroscopie, imagerie hyper-spectrale et tomographie) qui est totalement non-destructive et pour compl\u00e9menter l\u2019information physico-chimique fournie par les mesures infrarouges et Raman, une palette de techniques issues des derni\u00e8res avanc\u00e9es technologiques et de collaborations (\u00e0 l\u2019\u00e9chelle locale et nationale) a \u00e9t\u00e9 progressivement adjointe pour arriver \u00e0 caract\u00e9riser de la fa\u00e7on la plus compl\u00e8te possible les \u00e9chantillons analys\u00e9s. Il s\u2019agit en particulier des microscopies \u00e9lectroniques par Transmission (MET) et \u00e0 Balayage (MEB), de la fluorescence XRF sur synchrotron (<a href=\"https:\/\/www.synchrotron-soleil.fr\/fr\/lignes-de-lumiere\/nanoscopium\">ligne NANOSCOPIUMpisch SOLEIL<\/a>), de la tomographie X (Lignes <a href=\"https:\/\/www.synchrotron-soleil.fr\/fr\/lignes-de-lumiere\/psiche\">PSICH\u00c9<\/a> et <a href=\"https:\/\/www.synchrotron-soleil.fr\/fr\/lignes-de-lumiere\/anatomix\">ANATOMIX<\/a>, SOLEIL) et de la spectrom\u00e9trie de masse d\u2019ions secondaires coupl\u00e9e \u00e0 un temps de vol (TOF-SIMS, plateforme <a href=\"https:\/\/www.placamat.cnrs.fr\/\">PLACAMAT<\/a> (Bordeaux), et collaborations <a href=\"https:\/\/www.ijclab.in2p3.fr\/plateforme\/andromede\/\">Androm\u00e8de<\/a> (IJCLab) et LAEC (Liban)).<\/p><p>\u00a0<\/p><p>L\u2019ensemble de ces techniques permet \u00e0 l\u2019\u00e9quipe A&amp;O d\u2019\u00e9tudier, \u00e0 la fois, les propri\u00e9t\u00e9s physiques (porosit\u00e9, assemblage des min\u00e9raux, fracturation) et chimiques (composition des phases min\u00e9rales et organiques et leurs colocalisations) des \u00e9chantillons analys\u00e9s afin de mieux contraindre les processus pr\u00e9 et post-accr\u00e9tionnels subis sur leurs corps parents.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-c956263 e-con e-atomic-element e-flexbox-base e-f8d7ce3 \" data-id=\"c956263\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"c956263\">\n    <div class=\"elementor-element elementor-element-ad6a2f9 e-con e-atomic-element e-flexbox-base e-baa7a1b \" data-id=\"ad6a2f9\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"ad6a2f9\">\n    \t\t<div class=\"elementor-element elementor-element-7e51421 elementor-widget elementor-widget-image\" data-id=\"7e51421\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-02-300x300.png\" class=\"attachment-medium size-medium wp-image-791\" alt=\"\" srcset=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-02-300x300.png 300w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-02-150x150.png 150w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-02.png 485w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-acc0da2 elementor-widget elementor-widget-text-editor\" data-id=\"acc0da2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>La microscopie \u00e9lectronique en transmission offre une vue fascinante des subtilit\u00e9s nanoscopiques de la mati\u00e8re extraterrestre, qui t\u00e9moigne de l\u2019histoire complexe des ast\u00e9ro\u00efdes. Ici, un <strong>grain de l\u2019ast\u00e9ro\u00efde carbon\u00e9 Ryugu<\/strong>, collect\u00e9 par la mission Hayabusa2, d\u00e9voile un nodule de mati\u00e8re organique entour\u00e9 de phyllosilicates \u00e0 gros grains et d\u2019une matrice argileuse fine, riche en cristaux de sulfures.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-c39d840 e-con e-atomic-element e-flexbox-base e-c39d840-11b4292 \" data-id=\"c39d840\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"c39d840\">\n    \t\t<div class=\"elementor-element elementor-element-9f57b27 elementor-widget elementor-widget-image\" data-id=\"9f57b27\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"293\" height=\"325\" src=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-03-1.png\" class=\"attachment-full size-full wp-image-792\" alt=\"\" srcset=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-03-1.png 293w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-03-1-270x300.png 270w\" sizes=\"(max-width: 293px) 100vw, 293px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-da6ae6e elementor-widget elementor-widget-text-editor\" data-id=\"da6ae6e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Distributions 3D de diff\u00e9rents composants sur un grain de l\u2019ast\u00e9ro\u00efde Ryugu analys\u00e9 en\u00a0tomographies X et IR : (a) Toute la mati\u00e8re, (b) Vue sur sa porosit\u00e9, (c) Diff\u00e9rents type de min\u00e9raux et (d) Distribution des organiques CH aliphatiques.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n\n<\/div>\n<div class=\"elementor-element elementor-element-ffcdfb7 e-con e-atomic-element e-flexbox-base e-ffcdfb7-5f1323e \" data-id=\"ffcdfb7\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"ffcdfb7\">\n    \t\t<div class=\"elementor-element elementor-element-22748e8 elementor-widget elementor-widget-text-editor\" data-id=\"22748e8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><b>Exp\u00e9riences d\u2019irradiation sur mat\u00e9riaux extraterrestres et leurs analogues<br \/><\/b><span style=\"font-style: inherit; font-weight: inherit;\">Une partie importante des travaux de l\u2019\u00e9quipe A&amp;O tourne autour de l\u2019\u00e9tude des effets de l\u2019irradiation sur diff\u00e9rents types de surfaces solides. Cette activit\u00e9 couvre d\u2019une part, l\u2019\u00e9tude de l\u2019\u00e9volution physico-chimique de m\u00e9langes de glaces irradi\u00e9es et la formation de mati\u00e8re organique mol\u00e9culaire et macromol\u00e9culaire complexe ; et d\u2019autre part, l\u2019\u00e9tude de l\u2019\u00e9volution et l\u2019alt\u00e9ration de surfaces plan\u00e9taires et celles de petits corps (ast\u00e9ro\u00efdes, trans-neptuniens) sous l\u2019effet de l\u2019irradiation par le vent solaire et le rayonnement cosmique. Pour cela, l\u2019\u00e9quipe a d\u00e9velopp\u00e9, le dispositif <\/span><a style=\"font-style: inherit; font-weight: inherit; background-color: #ffffff;\" href=\"https:\/\/www.ias.universite-paris-saclay.fr\/fr\/content\/ingmar\">INGMAR<\/a><span style=\"font-style: inherit; font-weight: inherit;\"> (IrradiatioN de Glaces et de M\u00e9t\u00e9orites Analys\u00e9es en R\u00e9flectance) en collaboration avec <\/span><a style=\"font-style: inherit; font-weight: inherit; background-color: #ffffff;\" href=\"https:\/\/www.ijclab.in2p3.fr\/plateforme\/andromede\/\">l\u2019IJCLab<\/a><span style=\"font-style: inherit; font-weight: inherit;\">.<br \/><\/span><span style=\"font-style: inherit; font-weight: inherit;\">INGMAR est constitu\u00e9 d\u2019une chambre \u00e0 vide reli\u00e9e \u00e0 l\u2019implantateur d\u2019ions <\/span><a style=\"font-style: inherit; font-weight: inherit; background-color: #ffffff;\" href=\"https:\/\/mosaic.ijclab.in2p3.fr\/irradiations-2\/sidonie\/\">SIDONIE<\/a><span style=\"font-style: inherit; font-weight: inherit;\"> (IJCLab) et \u00e0 des lignes de spectroscopie visible et infrarouge permettant un suivi <\/span><em style=\"font-weight: inherit;\">in situ<\/em><span style=\"font-style: inherit; font-weight: inherit;\"> de l\u2019\u00e9volution des spectres des \u00e9chantillons durant leur irradiation. Selon l\u2019\u00e9paisseur des \u00e9chantillons pr\u00e9par\u00e9s, la mesure peut se faire soit en transmission (0,4-25 \u00b5m) soit en r\u00e9flexion (0,4-5 \u00b5m). Un cryostat permet de faire varier la temp\u00e9rature des \u00e9chantillons plac\u00e9s \u00e0 son extr\u00e9mit\u00e9 de 12 \u00e0 300K. Une ligne de m\u00e9lange de gaz est raccord\u00e9e \u00e0 la chambre sous vide et permet de d\u00e9poser sur le doigt froid du cryostat diff\u00e9rents m\u00e9lange de glaces. Diff\u00e9rents ions sont disponibles, leurs \u00e9nergies et fluences peuvent \u00eatre choisies selon le processus astrophysique \u00e0 simuler\/\u00e9tudier.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-8e32670 e-con e-atomic-element e-flexbox-base e-8e32670-409ef45 \" data-id=\"8e32670\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"8e32670\">\n    <div class=\"elementor-element elementor-element-5a2787b e-con e-atomic-element e-flexbox-base e-5a2787b-ea2326d \" data-id=\"5a2787b\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"5a2787b\">\n    \t\t<div class=\"elementor-element elementor-element-4a95a9c elementor-widget elementor-widget-image\" data-id=\"4a95a9c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"476\" height=\"374\" src=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-04.png\" class=\"attachment-medium_large size-medium_large wp-image-811\" alt=\"\" srcset=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-04.png 476w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-04-300x236.png 300w\" sizes=\"(max-width: 476px) 100vw, 476px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2a084ac elementor-widget elementor-widget-text-editor\" data-id=\"2a084ac\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Image obtenue en microscopie \u00e9lectronique \u00e0 haute r\u00e9solution d\u2019une serpentine irradi\u00e9e \u00e0 l\u2019Ar+. Une r\u00e9gion tr\u00e8s v\u00e9sicul\u00e9e se trouve au-dessus de la r\u00e9gion vierge (non irradi\u00e9e). La couche sup\u00e9rieure est constitu\u00e9e d&rsquo;un mince rebord riche en SiO.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-c1c023a e-con e-atomic-element e-flexbox-base e-c1c023a-b386d61 \" data-id=\"c1c023a\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"c1c023a\">\n    \t\t<div class=\"elementor-element elementor-element-38e4e29 elementor-widget elementor-widget-image\" data-id=\"38e4e29\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"1301\" height=\"990\" src=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-05.png\" class=\"attachment-full size-full wp-image-812\" alt=\"\" srcset=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-05.png 1301w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-05-300x228.png 300w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-05-1024x779.png 1024w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-05-768x584.png 768w\" sizes=\"(max-width: 1301px) 100vw, 1301px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a7e0154 elementor-widget elementor-widget-text-editor\" data-id=\"a7e0154\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>\u00c0 gauche :<\/strong> spectres MIR obtenus sur une pastille de la m\u00e9t\u00e9orite CM MET01070 avant (bleu et vert)\u00a0et apr\u00e8s irradiation aux ions He+ \u00e0 diff\u00e9rentes \u00e9nergies (orange et rouge). <br \/><br \/><strong>\u00c0 droite :<\/strong> images de la position du pic principal vers 10 um (montr\u00e9 \u00e0 gauche) o\u00f9 l\u2019on voit des diff\u00e9rences nettes entre les deux \u00e9nergies d&rsquo;irradiation (au centre de la pastille sur les deux vignettes) et le bord de la pastille qui a \u00e9t\u00e9 cach\u00e9 pendant l\u2019irradiation. Plus l\u2019irradiation est importante, plus le spectre est modifi\u00e9. C\u2019est un nouveau marqueur de l\u2019alt\u00e9ration spatiale mis en \u00e9vidence dans l\u2019\u00e9quipe\u00a0que nous utilisons sur les observations des petits corps.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n\n<\/div>\n<div class=\"elementor-element elementor-element-cb8ed83 e-con e-atomic-element e-flexbox-base e-cb8ed83-efc9e81 \" data-id=\"cb8ed83\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"cb8ed83\">\n    \t\t<div class=\"elementor-element elementor-element-9ed7713 elementor-widget elementor-widget-text-editor\" data-id=\"9ed7713\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>Observations de petits corps du SS<br \/><\/strong>L\u2019expertise de l\u2019\u00e9quipe dans l\u2019analyse de mati\u00e8re extraterrestre et ce notamment par spectrom\u00e9trie de masse, a \u00e9t\u00e9 mise \u00e0 profit pour la caract\u00e9risation des poussi\u00e8res com\u00e9taires collect\u00e9es puis mesur\u00e9es en TOF-SIMS par l\u2019instrument embarqu\u00e9 <a href=\"https:\/\/www.ias.u-psud.fr\/fr\/content\/cosima-instrument-de-rosetta-l%C3%A8ve-le-voile-sur-la-composition-de-la-com%C3%A8te-67p\">COSIMA<\/a> (et son microscope COSISCOPE (responsable : Yves Langevin, IAS)). C\u2019est ainsi que nous avons pu r\u00e9v\u00e9ler la teneur tout particuli\u00e8rement \u00e9lev\u00e9e en carbone des poussi\u00e8res de la com\u00e8te 67P\/Churyumov-Gerasimenko et que nous continuons \u00e0 travailler sur cette somme exceptionnelle de donn\u00e9es spectrom\u00e9triques afin d\u2019affiner nos connaissances sur la composition chimique et la structure physique de cette mati\u00e8re primitive.<\/p><p>Par ailleurs, forte de son expertise de laboratoire en spectroscopie IR, l\u2019\u00e9quipe est sollicit\u00e9e par des projets spatiaux afin de participer \u00e0 l\u2019analyse des donn\u00e9es de missions en vol (observations \u00e0 distance). Cela a notamment \u00e9t\u00e9 le cas pour les missions de retour d\u2019\u00e9chantillons <a href=\"https:\/\/www.isas.jaxa.jp\/en\/missions\/spacecraft\/current\/hayabusa2.html\">Hayabusa2\/JAXA<\/a> et <a href=\"https:\/\/science.nasa.gov\/mission\/osiris-rex\/\">OSIRIS-REx\/NASA<\/a> o\u00f9 l\u2019\u00e9quipe a \u00e9t\u00e9 impliqu\u00e9e dans les analyses des instruments NIRS3 (Near Infrared Spectrometer), OVIRS (OSIRIS-REx Visible and Infrared Spectrometer) et OTES (OSIRIS-REx Thermal Emission Spectrometer) pour la recherche d\u2019indices spectroscopiques li\u00e9s \u00e0 l\u2019alt\u00e9ration spatiale (changement de pente spectrale, d\u00e9placement de bandes, etc.).<\/p><p><span style=\"font-style: inherit; font-weight: inherit;\">De plus, l\u2019\u00e9quipe explore les confins du syst\u00e8me solaire gr\u00e2ce au t\u00e9lescope spatial <\/span><a style=\"font-style: inherit; font-weight: inherit; background-color: #ffffff;\" href=\"https:\/\/www.jwst.fr\/\">James Webb<\/a><span style=\"font-style: inherit; font-weight: inherit;\"> (JWST), qui ouvre une nouvelle fen\u00eatre sur les objets trans-neptuniens, ces corps glac\u00e9s t\u00e9moins de la formation plan\u00e9taire. Nous sommes co-investigateurs de plusieurs projets majeurs, dont un grand programme international (DiSCo), pour observer et analyser ces objets lointains avec l\u2019instrument <\/span><a style=\"font-style: inherit; font-weight: inherit; background-color: #ffffff;\" href=\"https:\/\/science.nasa.gov\/mission\/webb\/nirspec\/\">NIRSpec<\/a><span style=\"font-style: inherit; font-weight: inherit;\">. Notre expertise unique en laboratoire permet d\u2019identifier les mol\u00e9cules pr\u00e9sentes \u00e0 leur surface et de d\u00e9crypter leurs spectres afin de reconstituer leur composition et leur histoire. Nos travaux ont r\u00e9v\u00e9l\u00e9 trois grandes familles d\u2019objets trans-neptuniens, aux compositions chimiques distinctes, offrant un \u00e9clairage nouveau sur la formation du syst\u00e8me solaire. Ces r\u00e9sultats servent aussi de r\u00e9f\u00e9rence pour l\u2019\u00e9tude d\u2019autres corps glac\u00e9s, comme les Centaures ou les Trojans de Neptune. L\u2019\u00e9quipe pilote l\u2019analyse des spectres et le d\u00e9veloppement de sc\u00e9narios sur l\u2019origine et l\u2019\u00e9volution de ces objets, et accueille r\u00e9guli\u00e8rement des \u00e9tudiants \u00e0 l\u2019interface entre observations spatiales et exp\u00e9rimentations en laboratoire.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-ebf4475 e-con e-atomic-element e-flexbox-base e-ebf4475-aea58bb \" data-id=\"ebf4475\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"ebf4475\">\n    <div class=\"elementor-element elementor-element-fc06f71 e-con e-atomic-element e-flexbox-base e-fc06f71-575257d \" data-id=\"fc06f71\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"fc06f71\">\n    \t\t<div class=\"elementor-element elementor-element-66aaeb1 elementor-widget elementor-widget-image\" data-id=\"66aaeb1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"606\" height=\"306\" src=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-06.png\" class=\"attachment-medium_large size-medium_large wp-image-820\" alt=\"\" srcset=\"https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-06.png 606w, https:\/\/www.ias.u-psud.fr\/wp-content\/uploads\/2026\/07\/origine-06-300x151.png 300w\" sizes=\"(max-width: 606px) 100vw, 606px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cf840a5 elementor-widget elementor-widget-text-editor\" data-id=\"cf840a5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Repr\u00e9sentation artistique de la distribution des objets transneptuniens dans le disque de plan\u00e9t\u00e9simaux, avec des spectres repr\u00e9sentatifs superpos\u00e9s de chaque groupe de composition, mettant en \u00e9vidence les mol\u00e9cules dominantes sur leurs surfaces. Cr\u00e9dit : Illustration graphique de William D. Gonz\u00e1lez Sierra pour le Florida Space Institute, Universit\u00e9 de Floride Centrale.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fd8b59d elementor-widget elementor-widget-menu-anchor\" data-id=\"fd8b59d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"menu-anchor.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-menu-anchor\" id=\"moyens-techniques\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n\n<\/div>\n<div class=\"elementor-element elementor-element-c70df54 e-con e-atomic-element e-flexbox-base e-c70df54-4891dfb \" data-id=\"c70df54\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"c70df54\">\n    \t\t<div class=\"elementor-element elementor-element-6690206 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"6690206\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeIn&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Moyens techniques<\/h2>\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-f1f60b4 e-con e-atomic-element e-flexbox-base e-f1f60b4-8240685 \" data-id=\"f1f60b4\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"f1f60b4\">\n    \t\t<div class=\"elementor-element elementor-element-ccb4409 elementor-widget elementor-widget-text-editor\" data-id=\"ccb4409\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Les ressources (propres et partag\u00e9es) \u00e0 la disposition de l&rsquo;\u00e9quipe incluent les \u00e9quipements suivants et leur environnement, notamment en termes de chambres \u00e0 vide, cryog\u00e9nie et sources.<\/p><p><strong>Exp\u00e9riences et dispositifs situ\u00e9s dans les b\u00e2timents de l\u2019IAS :<\/strong><\/p><ul><li>Une salle blanche de classe ISO 7 dot\u00e9e d\u2019un flux laminaire de classe ISO 5. Cette salle comprend :<br \/>&#8211; Un micromanipulateur motoris\u00e9 (Quick pro Microsupport) pour la pr\u00e9paration des \u00e9chantillons de taille variant de ~ 10 \u00b5m \u00e0 quelques millim\u00e8tres.<br \/>&#8211; Un macroscope (Leica) et un microscope (Nikon).<br \/>&#8211; Des spectrom\u00e8tres UV-Visible-proche infrarouge fibr\u00e9s.<\/li><li>Un spectrom\u00e8tre infrarouge \u00e0 transform\u00e9e de Fourier, MIR par transmission (VERTEX 70) auquel peut \u00eatre raccord\u00e9\u00a0:<br \/>&#8211; Une cellule environnementale haute temp\u00e9rature haute pression. [300, 1000 K] et jusqu\u2019\u00e0 69 bar (voir Pronext).<\/li><li>Une ligne d\u2019arriv\u00e9e de gaz via une bouteille pour les m\u00e9langes (volume tampon) alimentant la cellule Pronext.<\/li><li>Un spectrom\u00e8tre infrarouge \u00e0 transform\u00e9e de Fourier, (INVENIO-R).<\/li><li>Un \u00e9vaporateur par pulv\u00e9risation cathodique sous vide pouss\u00e9 (pour la synth\u00e8se de films minces de silicates ou autres).<\/li><li>Un four tubulaire sous vide permettant des recuits jusqu\u2019\u00e0 1200 \u00b0C.<\/li><li>Un dispositif pour la production de films organiques de diff\u00e9rentes compositions par plasma induit par d\u00e9charge micro-onde.<\/li><li>Un appareil de chromatographie en phase liquide haute performance de type HPLC (Dionex) coupl\u00e9 \u00e0 spectrographe UV-visible \u00e0 barrette de diodes.<\/li><li>Lampes \u00e0 d\u00e9charge d&rsquo;hydrog\u00e8ne micro-onde (source VUV).<\/li><\/ul><p>\u00a0<\/p><p>\u00a0<\/p><p><strong>Exp\u00e9riences et dispositifs mutualis\u00e9s :<\/strong><\/p><ul><li>Le dispositif INGMAR en collaboration avec IJCLab (situ\u00e9 au b\u00e2timent 108, raccord\u00e9 \u00e0 l\u2019acc\u00e9l\u00e9rateur SIDONIE, IJCLab) qui comprend :<br \/>&#8211; Une chambre \u00e0 vide.<br \/>&#8211; Un cryostat.<br \/>&#8211; Un spectrom\u00e8tre fibr\u00e9\u00a0 UV-Visible-proche infrarouge et un spectrom\u00e8tre FTIR.<\/li><li>Un imageur hyperspectral Infrarouge (Cary 670\/620) avec sa source interne (Globar) install\u00e9 dans les locaux de la ligne SMIS du synchrotron SOLEIL.<\/li><li>Un bolom\u00e8tre- refroidi \u00e0 l\u2019h\u00e9lium liquide sur spectrom\u00e8tre FTIR (ligne SMIS SOLEIL).<\/li><li>La microscopie \u00e9lectronique \u00e0 balayage (install\u00e9 au laboratoire <a href=\"https:\/\/geops.geol.u-psud.fr\/\">GEOPS<\/a>)\u2013 FEG-ESEM \u00e9quip\u00e9 d\u2019un couplage Dual EDS \/ \u00b5-XRF.<\/li><li>La microscopie \u00e9lectronique \u00e0 transmission (MET 200 keV JEOL\/EDS\/STEM), \u00e9quipement install\u00e9 \u00e0 <a href=\"https:\/\/www.centralesupelec.fr\/\">CentraleSup\u00e9lec<\/a>.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Pr\u00e9sentation L&rsquo;\u00e9quipe Astrochimie et Origines\u00a0est une \u00e9quipe essentiellement exp\u00e9rimentale qui combine des analyses et des simulations en laboratoire \u00e0 l&rsquo;interpr\u00e9tation, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"inline_featured_image":false,"site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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