{"id":934,"date":"2026-07-28T17:21:31","date_gmt":"2026-07-28T15:21:31","guid":{"rendered":"https:\/\/www-new.ias.u-psud.fr\/?page_id=934"},"modified":"2026-09-23T11:40:51","modified_gmt":"2026-09-23T09:40:51","slug":"cosmologie","status":"publish","type":"page","link":"https:\/\/www.ias.u-psud.fr\/index.php\/cosmologie\/","title":{"rendered":"Cosmologie"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"934\" class=\"elementor elementor-934\" 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\" 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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-1031\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/cosmologie\/#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-1032\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/cosmologie\/#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-1033\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/cosmologie\/#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-1034\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/cosmologie\/#moyens-techniques\" class=\"elementor-item elementor-item-anchor menu-link\">Moyens techniques<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-1035\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/cosmologie\/#traitement-donnees\" class=\"elementor-item elementor-item-anchor menu-link\">Traitement des donn\u00e9es<\/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 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class=\"elementor-nav-menu--dropdown elementor-nav-menu__container\" aria-hidden=\"true\">\n\t\t\t\t<ul id=\"menu-2-307741f\" class=\"elementor-nav-menu\"><li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-1031\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/cosmologie\/#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-1032\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/cosmologie\/#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-1033\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/cosmologie\/#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-1034\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/cosmologie\/#moyens-techniques\" class=\"elementor-item elementor-item-anchor menu-link\" tabindex=\"-1\">Moyens techniques<\/a><\/li>\n<li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-1035\"><a href=\"https:\/\/www-new.ias.u-psud.fr\/index.php\/cosmologie\/#traitement-donnees\" class=\"elementor-item elementor-item-anchor menu-link\" tabindex=\"-1\">Traitement des donn\u00e9es<\/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>Cosmologie<\/strong> se concentre sur des domaines d&rsquo;\u00e9tudes qui vont des premi\u00e8res fluctuations de l&rsquo;univers jusqu&rsquo;\u00e0 sa structuration \u00e0 grande \u00e9chelle r\u00e9cente. Nous \u00e9tudions comment se forment et se structurent les diff\u00e9rents \u00e9l\u00e9ments de la toile cosmique tant par une approche observationnelle que par la mod\u00e9lisation.\u00a0<\/p><p>\u00a0<\/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>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4e27a7d e-con e-atomic-element e-flexbox-base e-ec4c6fe \" data-id=\"4e27a7d\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"4e27a7d\">\n    \t\t<div class=\"elementor-element elementor-element-09f7491 elementor-blockquote--align-center elementor-blockquote--skin-border elementor-widget elementor-widget-blockquote\" data-id=\"09f7491\" 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 Comprendre l\u2019\u00e9volution de l\u2019Univers, depuis le Big Bang jusqu\u2019\u00e0 aujourd\u2019hui, en analysant les observations actuelles (satellites, t\u00e9lescopes) et en mod\u00e9lisant les processus physiques qui ont fa\u00e7onn\u00e9 sa structure. \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\">Laura Salvati, Co-responsable de l'\u00e9quipe Cosmologie<\/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>Nous abordons deux des grands th\u00e8mes de la discipline : les lois physiques qui gouvernent l&rsquo;Univers, et la formation et l&rsquo;\u00e9volution de l&rsquo;Univers. Les activit\u00e9s de l&rsquo;\u00e9quipe Cosmologie s&rsquo;articulent donc autour d&rsquo;un continuum de probl\u00e8mes physiques li\u00e9s \u00e0 la structuration de la mati\u00e8re depuis le Fond Diffus Cosmologique (FDC) jusqu&rsquo;aux galaxies. Elles font appel \u00e0 des approches observationnelles, de mod\u00e9lisation, de simulation et th\u00e9oriques.<\/p><p>Un effort tout particulier est men\u00e9 pour le d\u00e9veloppement d&rsquo;outils de\u00a0<a href=\"https:\/\/www.ias.universite-paris-saclay.fr\/fr\/activites-de-recherche\/cosmologie\/traitement-des-donnees\">traitement et d&rsquo;analyse des donn\u00e9es<\/a>, ainsi que pour la diffusion de produits et de logiciels de r\u00e9f\u00e9rence pour la communaut\u00e9. Nous menons en parall\u00e8le des activit\u00e9s pluridisciplinaires de R&amp;D dans le domaine des bolom\u00e8tres, notamment les matrices de bolom\u00e8tres pour les futurs projets.<\/p><p>Nos d\u00e9veloppements instrumentaux s&rsquo;inscrivent dans le contexte programmatique spatial et sol de la discipline. Nous avons \u00e9t\u00e9 PI de\u00a0<a href=\"https:\/\/www.ias.u-psud.fr\/content\/planck-hfi\">Planck\/HFI<\/a>. Nous avons eu et avons des engagements sur des contributions instrumentales ou au segment sol sur\u00a0<a href=\"http:\/\/sci.esa.int\/iso\/\">ISO<\/a>,\u00a0<a href=\"http:\/\/sci.esa.int\/xmm-newton\/\">XMM-Newton<\/a>,\u00a0<a href=\"https:\/\/www.ias.u-psud.fr\/content\/euclid\">EUCLID<\/a>\u00a0(mission M2 ESA), <a href=\"https:\/\/cnes.fr\/fr\/web\/CNES-fr\/9321-le-submillimetrique-pronaos.php\">PRONAOS<\/a>\u00a0(ballon CNES), <a href=\"https:\/\/ipag.osug.fr\/~ponthien\/NIKA2\/Welcome.html\">NIKA<\/a>\u00a0(instrument sur t\u00e9lescope IRAM 30m), <a href=\"https:\/\/www.the-athena-x-ray-observatory.eu\/es\">ATHENA<\/a>\u00a0(mission L2 ESA). Nous participons au d\u00e9veloppement de <a href=\"https:\/\/www.isas.jaxa.jp\/en\/missions\/spacecraft\/future\/litebird.html\">LiteBIRD<\/a> (JAXA) en tant que futur satellite du FDC, et nous dirigeons le projet de ballon <a href=\"https:\/\/www.ias.universite-paris-saclay.fr\/en\/content\/bisou\">BISOU<\/a> (CNES) en tant que pr\u00e9curseur pour les futures exp\u00e9riences de distorsions spectrales.<\/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\/pperso\/naghanim\/\">Nabila Aghanim<\/a> (directrice de recherche)<\/li><li><a href=\"http:\/\/www.ias.u-psud.fr\/annuaire?nom=albanese\">Pietro Albanese Guidi<\/a> (doctorant)<\/li><li><a href=\"http:\/\/www.ias.u-psud.fr\/annuaire?nom=besnard\">Ana\u00efs Besnard<\/a>\u00a0 (doctorante)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=bonnaire\">Tony Bonnaire <\/a>(charg\u00e9 de recherche)<\/li><li><a href=\"http:\/\/www.ias.u-psud.fr\/annuaire?nom=coulon\">Xavier Coulon<\/a> (post-doctorant)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=crascall-kennedy\">Lilian Crascall-Kennedy<\/a> (doctorante)<\/li><li><a href=\"https:\/\/www.ucm.es\/dsysd\/aurelien-decelle\">Aur\u00e9lien Decelle<\/a> (chercheur associ\u00e9)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/dole\/\">Herv\u00e9 Dole<\/a> (professeur)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/douspis\/\">Marian Douspis<\/a> (astronome)<\/li><li><a href=\"http:\/\/www.ias.u-psud.fr\/annuaire?nom=dumilly\">L\u00e9a Dumilly<\/a> (doctorante)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=dusserre\">Tanguy Dusserre<\/a> (doctorant)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=fabbian\">Giulio Fabbian<\/a> (directeur de recherche)<\/li><li><a href=\"https:\/\/adeliegorce.github.io\/\">Ad\u00e9lie Gorce<\/a> (charg\u00e9e de recherche, coresponsable d&rsquo;\u00e9quipe)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=grain\">Julien Grain<\/a> (charg\u00e9 de recherche)<\/li><li><a href=\"http:\/\/www.ias.u-psud.fr\/annuaire?nom=holland\">Hugo Holland<\/a> (doctorant)<\/li><li><a href=\"http:\/\/www.ias.u-psud.fr\/annuaire?nom=jung\">Rapha\u00ebl Hembert<\/a> (Ing\u00e9nieur de recherche)<\/li><li><span data-olk-copy-source=\"MessageBody\">Shuowen Jin (chercheur)<\/span><\/li><li>Louis Legrand (chercheur associ\u00e9)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=loquet-legall\">Morgane Loquet Le Gall<\/a> (doctorante)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=maffei\">Bruno Maffei<\/a> (professeur)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=maurin\">Lo\u00efc Maurin<\/a> (Ing\u00e9nieur de recherche)<\/li><li><a href=\"http:\/\/www.ias.u-psud.fr\/annuaire?nom=mousset\">Louise Mousset<\/a> (ma\u00eetresse de conf\u00e9rences)<\/li><li><a href=\"http:\/\/www.ias.u-psud.fr\/annuaire?nom=noor\">Mehdi Noor<\/a> (doctorant)<\/li><li><a href=\"https:\/\/docente.unife.it\/luca.pagano\/\">Luca Pagano<\/a> (chercheur associ\u00e9)<\/li><li><a href=\"http:\/\/www.ias.u-psud.fr\/annuaire?nom=paste\">Jade Paste<\/a> (doctorante)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=puget\">Jean-Loup Puget<\/a> (directeur de recherche \u00e9m\u00e9rite)<\/li><li><a href=\"http:\/\/www.ias.u-psud.fr\/annuaire?nom=salvati\">Laura Salvati<\/a> (charg\u00e9e de recherches, coresponsable d&rsquo;\u00e9quipe)<\/li><li><a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=sauvage\">Valentin Sauvage<\/a> (Post-doc)<\/li><li><a href=\"https:\/\/www.cristal.univ-lille.fr\/profil\/jsorce\/\">Jenny Sorce<\/a> (chercheuse associ\u00e9e)<\/li><li><a href=\"https:\/\/orcid.org\/0000-0002-3965-7080\">Samantha Stever<\/a> (chercheuse associ\u00e9e)<\/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>L&rsquo;\u00e9quipe Cosmologie rassemble des experts de cosmologie observationnelle et th\u00e9orique qui cherchent \u00e0 comprendre la formation des grandes structures cosmiques et leur \u00e9volution. Ses membres ma\u00eetrisent les techniques d&rsquo;observation et de mod\u00e9lisation du Fond Diffus Cosmologique (FDC), du\u00a0<a href=\"https:\/\/www.ias.u-psud.fr\/irgalaxies\/cib.php\">Fond Diffus Infrarouge<\/a>\u00a0(FDI), de la structuration de la mati\u00e8re aux grandes \u00e9chelles, des galaxies \u00e0\u00a0grand d\u00e9calage spectral (redshift), des amas de galaxies et des proto-amas. Le groupe est fortement impliqu\u00e9 dans les programmes scientifiques de\u00a0<a href=\"https:\/\/www.ias.u-psud.fr\/fr\/content\/planck-hfi\">Planck<\/a>,\u00a0<a href=\"https:\/\/www.ias.u-psud.fr\/fr\/content\/herschel\/\">Herschel<\/a>,\u00a0<a href=\"https:\/\/www.ias.u-psud.fr\/fr\/content\/euclid\/\">Euclid<\/a>,\u00a0<a href=\"http:\/\/sci.esa.int\/athena\/59896-mission-summary\/\">Athena<\/a>, ainsi que dans les\u00a0Large Programmes\u00a0de l&rsquo;ESO (Observatoire Europ\u00e9en Austral). Il contribue \u00e9galement \u00e0 la pr\u00e9paration scientifique du <a href=\"https:\/\/www.skao.int\/en\" target=\"_blank\" rel=\"noopener\">SKA<\/a>, au programme\u00a0Epoch of Reionization\u00a0de\u00a0<a href=\"http:\/\/www.lofar.org\/\">LOFAR<\/a>\u00a0ainsi qu&rsquo;\u00e0\u00a0diverses propositions observationnelles individuelles au sol et depuis l&rsquo;espace.<\/p><h3>Th\u00e8mes de recherche principaux :<\/h3><p><strong>Histoire de la formation stellaire \u00e0 travers les \u00e9poques cosmiques<\/strong>\u00a0par les observations du FDI, des points froids du FDI (proto-amas) et des sources r\u00e9solues du FDI, mod\u00e9lisation (mod\u00e8le de halo) de l&rsquo;\u00e9mission du FDI, \u00e9volution des\u00a0<a href=\"https:\/\/www.ias.u-psud.fr\/irgalaxies\/\">galaxies infrarouges<\/a>\u00a0par des approches analytiques et semi-analytiques.<\/p><p><strong>Cosmologie des grandes structures cosmiques<\/strong>\u00a0par la d\u00e9tection, l&rsquo;observation et l&rsquo;interpr\u00e9tation des amas de galaxies (vus par <a href=\"https:\/\/www.ias.u-psud.fr\/sz-clusters\/index.html\">l&rsquo;effet Sunyaev-Zel&rsquo;dovich<\/a>), analyses statistiques (technique de l&#8217;empilement, comptages, spectres de puissance).<\/p><p><strong>Mod\u00e9lisation de la r\u00e9ionisation<\/strong>\u00a0et analyses crois\u00e9es des donn\u00e9es (dont les corr\u00e9lations crois\u00e9es avec le FDC polaris\u00e9 ou non), mod\u00e9lisation des processus de magn\u00e9togen\u00e8se au cours de la r\u00e9ionisation.<\/p><p><strong>Structuration de la mati\u00e8re \u00e0 grande \u00e9chelle<\/strong>\u00a0par les observations multi-longueurs d&rsquo;onde des galaxies, des proto-amas et des amas de galaxies et leur interpr\u00e9tation.<\/p><p><strong>Mesure des param\u00e8tres cosmologiques<\/strong>\u00a0par l&rsquo;analyse du FDC et des grandes structures cosmiques, contraintes sur l&rsquo;\u00e9nergie sombre par la mod\u00e9lisation et la d\u00e9tection de l&rsquo;effet Sachs-Wofle int\u00e9gr\u00e9, recherche et mod\u00e9lisation de non-gaussianit\u00e9s, corr\u00e9lations crois\u00e9es du FDC avec les traceurs de la distribution de mati\u00e8re \u00e0 grande \u00e9chelle (relev\u00e9s de galaxies, observations SZ et en rayons X, FDI, &#8230;)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-358119e e-con e-atomic-element e-flexbox-base e-358119e-bfd37fc \" data-id=\"358119e\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"358119e\">\n    \t\t<div class=\"elementor-element elementor-element-b3e7754 elementor-widget elementor-widget-menu-anchor\" data-id=\"b3e7754\" 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<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<div class=\"content\"><div class=\"field field-name-body field-type-text-with-summary field-label-hidden\"><div class=\"field-items\"><div class=\"field-item even\"><p>Notre groupe d\u2019instrumentation FANTAS-IAS (FAr-iNfrared To radio AstrophysicS InstrumentAtion for Space) a pour but de supporter les d\u00e9veloppements techniques des \u00e9quipes <a href=\"https:\/\/www.ias.universite-paris-saclay.fr\/fr\/activites-de-recherche\/cosmologie\/presentation\">Cosmologie<\/a>\u00a0 et <a href=\"https:\/\/www.ias.universite-paris-saclay.fr\/fr\/activites-de-recherche\/astrophysique-de-la-matiere-interstellaire\/presentation\">AMIS<\/a>\u00a0 au sein de l\u2019IAS. Nos activit\u00e9s portent \u00e0 la fois sur des phases de R&amp;D (Recherche et D\u00e9veloppement), sur l\u2019\u00e9talonnage d\u2019instruments pour l\u2019astrophysique, mais aussi sur des contributions instrumentales \u00e0 plusieurs projets, ainsi que sur la conception de nouveaux instruments dans le domaine THz &#8211; Radio.<\/p><h2>Recherche, D\u00e9veloppement et caract\u00e9risation<\/h2><h3><a href=\"https:\/\/www.ias.universite-paris-saclay.fr\/fr\/activites-de-recherche\/cosmologie\/instrumentation\/cryogenie\">Cryog\u00e9nie sub-K<\/a><\/h3><p>Nous avons mis en place \u00e0 la fois des moyens de tests cryog\u00e9nique mais travaillons aussi des recherches en cryog\u00e9nie. Nous effectuons des mesures de propri\u00e9t\u00e9s physiques de mat\u00e9riaux aux tr\u00e8s basses temp\u00e9ratures et d\u00e9veloppons un Engineering Model (EM) d\u2019un CCDR (Closed Cycle Dilution Refrigerator), \u00e9volution du syst\u00e8me sub-K en cycle ouvert utilis\u00e9 pour la mission Planck-HFI.<\/p><h3><a href=\"https:\/\/www.ias.universite-paris-saclay.fr\/fr\/activites-de-recherche\/cosmologie\/instrumentation\/optique-radio-frequence\">Optique \u2013 Radio Fr\u00e9quence<\/a><\/h3><p>Fort de l\u2019exp\u00e9rience acquise lors du d\u00e9veloppement de l\u2019optique de plusieurs projets pr\u00e9c\u00e9dents, nous continuons \u00e0 \u00e9tudier de nouveaux syst\u00e8mes optiques dans le domaine radio \u2013 submillim\u00e9trique pour les nouveaux projets tel que <a href=\"https:\/\/www.isas.jaxa.jp\/en\/missions\/spacecraft\/future\/litebird.html\">LiteBIRD<\/a> et <a href=\"https:\/\/www.ias.u-psud.fr\/en\/content\/bisou\">BISOU<\/a>.<\/p><h3><a href=\"https:\/\/www.ias.universite-paris-saclay.fr\/fr\/activites-de-recherche\/cosmologie\/instrumentation\/caracterisation_de_detecteurs_sub-K\">Caract\u00e9risation de d\u00e9tecteurs sub-K<\/a><\/h3><p>Notre syst\u00e8me cryog\u00e9nique DRACuLA (Detector irRAdiation Cryogenic faciLity for Astrophysics) permet d\u2019\u00e9tudier les effets des rayons cosmiques sur les d\u00e9tecteurs hyper sensibles fonctionnant \u00e0 tr\u00e8s basse temp\u00e9rature. Pour cela nous pouvons irradier des d\u00e9tecteurs et plan focaux (jusqu\u2019\u00e0 20mK typiquement) en couplant ce moyen de mesure avec un acc\u00e9l\u00e9rateur de particules.<\/p><h2>Contributions aux nouveaux projets<\/h2><p>Nos instrumentalistes travaillent essentiellement sur deux nouveaux projets en phase d\u2019\u00e9tude.<\/p><h3><a href=\"https:\/\/www.isas.jaxa.jp\/en\/missions\/spacecraft\/future\/litebird.html\">LiteBIRD<\/a><\/h3><p>Cette mission dirig\u00e9e par la JAXA aura pour but d\u2019effectuer la mesure de la polarisation du fond diffus cosmologique avec une sensibilit\u00e9 bien plus grande que ce que la mission spatiale Planck a pu faire. Trois instruments seront \u00e0 bord de cette mission\u00a0: LFT (Low Frequency Telescope) et MHFT (Medium and High Frequency Telescope). Les travaux sur <a href=\"https:\/\/www.litebird-europe.eu\/\">MHFT<\/a>, sous responsabilit\u00e9 europ\u00e9enne, sont coordonn\u00e9s par le CNES. L\u2019IAS travaille \u00e0 plusieurs contributions\u00a0:<\/p><ul><li>Conception (et d\u00e9veloppement quand la mission sera accept\u00e9e) d\u2019un des plans focaux de MHFT<\/li><li>Coordination de la caract\u00e9risation RF de l\u2019optique de MHFT<\/li><li>Coordination des \u00e9tudes de l\u2019impact des rayons cosmiques sur MHFT<\/li><\/ul><h3><a href=\"https:\/\/www.ias.u-psud.fr\/fr\/content\/bisou\">BISOU<\/a><\/h3><p>L\u2019IAS ayant aussi largement particip\u00e9 au succ\u00e8s de deux projets ballons dans le pass\u00e9 (PRONAOS et PILOT), notre \u00e9quipe dirige maintenant une collaboration internationale au travers d\u2019une phase 0 d\u2019\u00e9tude (CNES), afin de d\u00e9velopper un pr\u00e9curseur pour d\u00e9tecter les distorsions spectrales du corps noir cosmologique \u00e0 partir d\u2019un ballon stratosph\u00e9rique.<\/p><p><strong>Contact <\/strong>: <a href=\"https:\/\/www.ias.u-psud.fr\/annuaire?nom=maffei\">Bruno Maffei<\/a><\/p><\/div><\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-22d28cb e-con e-atomic-element e-flexbox-base e-22d28cb-b67b8e5 \" data-id=\"22d28cb\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"22d28cb\">\n    \t\t<div class=\"elementor-element elementor-element-ca5edc4 elementor-widget elementor-widget-menu-anchor\" data-id=\"ca5edc4\" 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=\"traitement-donnees\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b65f33c elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"b65f33c\" 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\">Traitement des donn\u00e9es<\/h2>\t\t\t\t<\/div>\n\t\t\n<\/div>\n<div class=\"elementor-element elementor-element-066423f e-con e-atomic-element e-flexbox-base e-066423f-a63bd57 \" data-id=\"066423f\" data-element_type=\"e-flexbox\" data-e-type=\"e-flexbox\" data-interaction-id=\"066423f\">\n    \t\t<div class=\"elementor-element elementor-element-b354828 elementor-widget elementor-widget-text-editor\" data-id=\"b354828\" 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 Cosmologie est fortement impliqu\u00e9e dans le\u00a0<a href=\"https:\/\/idoc.ias.u-psud.fr\/\">Centre Int\u00e9gr\u00e9 de Donn\u00e9es et d&rsquo;Op\u00e9rations\u00a0(IDOC)<\/a>. Depuis sa cr\u00e9ation, elle d\u00e9veloppe et\u00a0maintient une expertise dans les cha\u00eenes de traitement de haut niveau sur des donn\u00e9es provenant de missions spatiales \u00e0 grandes longueurs d&rsquo;onde.<br \/><br \/>Nous avons d\u00e9velopp\u00e9, avec le groupe \u00ab\u00a0<a href=\"https:\/\/l2s.centralesupelec.fr\/search\/site\/division\/signaux\/content\/equipe-groupe-probl%c3%a8mes-inverses-gpi\">probl\u00e8mes inverses<\/a>\u00a0\u00bb du\u00a0<a href=\"https:\/\/l2s.prod.lamp.cnrs.fr\/\">L2S<\/a>, des m\u00e9thodes de super-r\u00e9solution non supervis\u00e9es (<a href=\"https:\/\/www.ias.u-psud.fr\/supreme\/\">SUPREME<\/a>) pour obtenir une r\u00e9solution deux \u00e0 trois fois meilleure sur les images et cartes spectrales de Herschel\/SPIRE. Nous avons adapt\u00e9 la m\u00e9thode de maximum de vraisemblance\u00a0<a href=\"https:\/\/www.ias.u-psud.fr\/sanepic\/\">SANEPIC<\/a>\u00a0aux donn\u00e9es de SPIRE et PACS. Ces pipelines et les donn\u00e9es, retrait\u00e9es de fa\u00e7on syst\u00e9matique et homog\u00e8ne, sont diffus\u00e9s par\u00a0<a href=\"https:\/\/idoc.ias.u-psud.fr\/\">IDOC<\/a>\u00a0via la base\u00a0<a href=\"http:\/\/idoc-herschel.ias.u-psud.fr\/sitools\/client-user\/\">HESIOD<\/a>, premier fournisseur de donn\u00e9es photom\u00e9triques Herschel dans l&rsquo;Observatoire Virtuel.<\/p><p>Dans\u00a0<a href=\"https:\/\/idoc.ias.u-psud.fr\/\">IDOC<\/a>, nous avons \u00e9galement d\u00e9velopp\u00e9 un portail th\u00e9matique \u00ab\u00a0<a href=\"http:\/\/szcluster-db.ias.u-psud.fr\/sitools\/client-user\/SZCLUSTER_DATABASE\/project-index.html\">Amas SZ<\/a>\u00a0\u00bb servant d&rsquo;interface pour la validation et la diffusion interne des catalogues Planck, ainsi que de support \u00e0\u00a0la diffusion publique des catalogues d&rsquo;amas SZ de Planck et des t\u00e9lescopes ACT et SPT. Ce portail regroupe de fa\u00e7on homog\u00e8ne des donn\u00e9es compl\u00e9mentaires ou \u00e0 valeur ajout\u00e9e. Nous travaillons \u00e0 \u00e9tendre ce service sur la caract\u00e9risation des amas de galaxies observ\u00e9s dans plusieurs longueurs d&rsquo;onde (MAGYC), notamment en optique (collaboration avec l&rsquo;OCA, Nice).<\/p>\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 Cosmologie se concentre sur des domaines d&rsquo;\u00e9tudes qui vont des premi\u00e8res fluctuations de l&rsquo;univers jusqu&rsquo;\u00e0 sa structuration \u00e0 [&hellip;]<\/p>\n","protected":false},"author":3,"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 center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-934","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.ias.u-psud.fr\/index.php\/wp-json\/wp\/v2\/pages\/934","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ias.u-psud.fr\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ias.u-psud.fr\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ias.u-psud.fr\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ias.u-psud.fr\/index.php\/wp-json\/wp\/v2\/comments?post=934"}],"version-history":[{"count":46,"href":"https:\/\/www.ias.u-psud.fr\/index.php\/wp-json\/wp\/v2\/pages\/934\/revisions"}],"predecessor-version":[{"id":3765,"href":"https:\/\/www.ias.u-psud.fr\/index.php\/wp-json\/wp\/v2\/pages\/934\/revisions\/3765"}],"wp:attachment":[{"href":"https:\/\/www.ias.u-psud.fr\/index.php\/wp-json\/wp\/v2\/media?parent=934"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}