Dr (Mr) Marian Douspis

Astronomer — Cosmologist

Deputy director of IAS
Scientifique head of IDOC at IAS


    Current Situation

  • Astronome à l'Institut d'Astrophysique Spatiale (Orsay)
  • HDR soutenue le 24/04/2014
  • Directeur adjoint IAS
  • Responsable scientifique IDOC

  • Précédemment

  • 01/2006-09/2006: Post-Doc à l'IAS
  • 01/2004-01/2006: Post-Doc au LATT (Toulouse)
  • 01/2002-01/2004: Post-Doc à l'université d'Oxford
  • 01/2001-01/2002: Coopérant du service national (Oxford)
  • 1997-2000 : thèse de doctorat au LATT (Toulouse)


  • BATMAN: ANR project on neutrino mass asessment from CMB data
  • LiteBIRD Space mission for CMB Polarisation observation
  • ByoPiC: ERC project on Baryon Picture of the Cosmos
  • IAS SZ Team
  • Euclid ESA mission to map the geometry of the dark Universe
  • Planck ESA CMB satellite
  • LOFAR EOR Radio interferometric array Reionisation Key Project
  • Archeops: CMB balloon

List of publications

  • See in ADS
  • see below for the most recent ones

Sunyaev Zeldovich effect

SZ clusters in Planck and ACT [Data, Modelling, constraints]
tSZ power spectrum in Planck [Data, Modelling, constraints]
SZ kinetic effect in CMB analyses [Modelling, constraints]


Constraints from CMB T, E modes and kSZ

Large scale structures

Integrated Sachs Wolf effect
Galaxy clusters
Filaments, voids, and superclusters


SZ Database SZDB
SZ-cluster Database szcluster-db
Machine learning probabilty of being a cluster in Planck map : cluster proba
MMF cluster detection
Cluster Validation tool
SZ component separation (MILCA, NILC)

Latest publications

full list available at ADS

Self-supervised component separation for the extragalactic submillimeter sky

A proof of concept on the use of deep learning for CMB component separation
2022, arXiv:2212.02847

Quasi-spherical superclusters

A study of quasi spherical supercclusters in Optical and SZ
2022 A&A, arXiv:2210.13294

Retrieving cosmological information from small-scale CMB foregrounds. II. The kinetic Sunyaev Zel'dovich effect

A new analysis of Planck and SPT using small scale secondary anisotropies (tSZ and kSZ) to get information on reionisation
2022 A&A, arXiv:2202.08698

X-ray emission from cosmic web filaments in SRG/eROSITA data

Detection of cosmic filaments in the eRosita early release data by stacking
2022, arXiv:2206.00084

Constraining the mass and redshift evolution of the hydrostatic mass bias using the gas mass fraction in galaxy clusters

A use of the gas fraction of ESZ galaxy clusters to study cosmology and hydrostatic mass bias evolution
2022, arXiv:2204.12823

Retrieving cosmological information from small-scale CMB foregrounds. I. The thermal Sunyaev Zel'dovich effect

2022 A&A, arXiv:2109.03272

Constraining cosmology with a new all-sky Compton parameter map from the Planck PR4 data

Building and using a news SZ map from Planck PR4 data for cosmological constraints
2022 MNRAS, arXiv:2110.08880

Euclid preparation. XV. Forecasting cosmological constraints for the Euclid and CMB joint analysis

Euclid forecast study using cross correlation between CMB and Euclid Survey
2022 A&A, arXiv:2106.08346

BISOU: a balloon project to measure the CMB spectral distortions

Description of the BISOU balloon
2021 MG16, arXiv:2111.00246

X-ray analysis of the Planck-detected triplet-cluster system PLCK G334.8-38

Analysis of the three components of the Planck supercluster with XMM data
2021 A&A, arXiv:2107.07801

MILCANN: A tSZ map for galaxy cluster detection assessed using a neural network

Machine learning based weighted Planck y-map
2021 A&A, arXiv:1702.00075

High-resolution tomography for galaxy spectroscopic surveys with angular redshift fluctuations

Forecasts of the angular redshift flucuations in future galaxy surveys
2021 A&A, arXiv:2007.14412

PACT. II. Pressure profiles of galaxy clusters using Planck and ACT

New pressure profile from Planck and ACT clusters from the PACT map (combined Planck and ACT SZ map)
2021 A\&A , arXiv:2105.05607

First detection of stacked X-ray emission from cosmic web filaments

Determination of stacked filaments properties from Xray observations and predictions
2021 A&A , arXiv:2011.05343

PACT. I. Combining ACT and Planck data for improved extraction of tSZ signal

First SZ map combining Planck and ACT data with large and small scales
2019, A&A arXiv:1902.00350

Density and temperature of cosmic-web filaments on scales of tens of megaparsecs

Determination of stacked filaments properties from SZ and lensing observations
2020 A&A , arXiv:1911.09706

Impact of systematics on cosmological parameters from future Galaxy Clusters surveys

Forecasts of future surveys depending of the precision on systematics
2020 A&A arXiv:2005.10204

Improved constraints on reionisation from CMB observations: A parameterisation of the kSZ effect

New physical parameterisation of the kSZ for reionisation studies
2020 A&A, arXiv:2004.06616

Mass bias evolution in tSZ cluster cosmology

Investigation of possible mass and redshift evolution of the mass bias of SZ clusters
2019 A&A, arXiv:1901.03096

Star formation rates and stellar masses from machine learning

Galaxy properties from Optical and IR colors with machine learning technique
2019 A&A arXiv:1901.01932

The COSMOS-UltraVISTA stellar-to-halo mass relationship: new insights on galaxy formation efficiency out to $z\sim5$

Stellar-to-halo mass relationship from precise galaxy stellar mass function measurements in the COSMOS field
2019 A&A arXiv:1810.10557

Detection of intercluster gas in superclusters using the thermal Sunyaev-Zel'dovich effect

Detection of misssing baryons in by stacking the SZ signal of superclusters in Planck ymap
2019 A&A arXiv:1805.04555

Constraints from thermal Sunyaev-Zel’dovich cluster counts and power spectrum combined with CMB

Constraints on LCDM, nuCDM and wCDM by combining cluster number counts and tSZ power spectrum from Planck with and without CMB.
2018A&A...614A..13S, arXiv:1708.00697

Gas and galaxies in filament between clusters of galaxies: The study of A399-A401

Detection and measure of the SZ effect and galaxy properties in Galaxy Cluster pairs
2018A&A...609A..49B, arXiv:1710.08699

Observational constraints on key-parameters of cosmic reionisation history

Combined analyses of direct reionisation measurements, high redshift galaxie luinosity function and CMB to constrain escape fraction and clumping factor evolution
2018A&A...616A.113G, arXiv:1710.04152

MILCANN : A neural network assessed tSZ map for galaxy cluster detection

Neural network applied for SZ cluster detection
A&A submitted, arXiv:1702.00075

Cosmology with Planck SZ cluster number counts

Cosmological constraints from Planck SZ clusters
A&A 2014, arXiv:1303.5080

Cosmology from Planck tSZ power spectrum

Cosmological constraints from the first power spectrum from Planck tSZ map
A&A 2014, arXiv:1303.5081

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