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Welcome on the pages of the Cosmology team !

Our research reaches from the primordial fluctuations in the Universe down to its structuration at the largest scales in the most recent era. We study how the cosmic web elements are forming and evolving both through modelling and observations.


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1 month 2 weeks ago

Euclid’s two instruments have captured their first test images. The mesmerising results indicate that the space telescope will achieve the scientific goals that it has been designed for – and possibly much more.

Although there are months to go before Euclid delivers its true new view of the cosmos, reaching this milestone means the scientists and engineers behind the mission are confident that the telescope and instruments are working well.



2 months 3 weeks ago

On July 1, Euclid was successfully launched from Cape Canaveral by a Space-X Falcon 9 rocket! The acquisition of the first signals also went according to plan.

The Euclid mission will map the universe, observing thousands of galaxies over the next 6 years, and thus lift the veil on dark matter and dark energy.

The commissioning phase now begins for the next 3 months, providing an opportunity to test the in-flight calibration lamp (calibration unit) developed at the IAS.

9 months 3 weeks ago

In a recent study the ByoPiC team takes advantage of the most recent X-ray survey, SRG/eROSITA, to confirm unambiguously the detection of an X-ray signal associated with thermal emission from a hot plasma in cosmic filaments.

This signal from only 460 filaments, located in the first 140 deg² survey published by the SRG/eROSITA collaboration, has allowed the density and temperature of the plasma to be constrained precisely.

11 months 2 weeks ago

For the first time, the distant galaxy clusters discovered by the Planck satellite can be explained by simulations which also predict their future evolution.

1 year 5 days ago

Hubert Bretonnière, Cosmology team, defended his thesis entitled "Galaxy morphology for Euclid: Simulations, forecasts and detection with deep learning", carried out under the supervision of Hervé Dole, Marc Huertas-Company, and Alexandre Boucaud. He is now a new doctor of Université Paris Saclay and is leaving for the University of Santa Cruz (USA). Congratulations to him!