Deep CosmoStat Days

Session

Weak lensing

12 févr. 2026, 14:55

Cassini (CEA/DAp)

3. UNIONS cosmological results with 2D weak lensing

Martin KILBINGER (CEA Saclay/Irfu/DAp)

12/02/2026 14:55

2. Inferring 3D shapes and measuring intrinsic alignments of galaxies with UNIONS

Antonin Corinaldi (CEA Paris-Saclay / AIM / CosmoStat)

12/02/2026 15:25

Galaxies are subject to intrinsic alignments, which correspond to the correlations between their 3D shapes and orientations and the underlying tidal field of dark matter across the large-scale structure of the Universe. This intrinsic galaxy alignment is traditionally measured with the two-point galaxy-density correlation function projected in the sky plane. However, the projection of 3D...

4. Impact of Baryonic Physics on Weak Lensing Statistics

Andreas Tersenov

12/02/2026 16:10

Weak gravitational lensing is a powerful probe of cosmology, but its small-scale information is affected by baryonic feedback from galaxy formation processes. Higher-order statistics offer access to non-Gaussian information beyond the angular power spectrum, yet their sensitivity to baryonic effects remains an open question. In this work, we study the impact of baryonic physics on cosmological...

11. Probing large-scale structures through cross-correlations of the tSZ effect

Emma Aycoberry (CosmoStat, CEA Paris-Saclay)

12/02/2026 16:30

Cross-correlations between the thermal Sunyaev–Zel’dovich (tSZ) effect and tracers of large-scale structure provide a powerful probe of both astrophysics and cosmology. In this talk, I will present results on the cross-correlation of the tSZ signal with weak gravitational lensing and galaxy clustering in the context of the Euclid mission. These measurements allow us to study the distribution...

19. Convergence map emulator & validation

Vilasini Tinnaneri Sreekanth

12/02/2026 16:50