Colloque national CMB-France #8

Session

Sessions 7

26 nov. 2026, 09:00

Institut Astrophysique de Paris

7. High angular resolution maps of polarized dust emission using scattering transforms on Planck data.

Alexandros Tsouros (ENS-PSL)

26/11/2026 09:00

Accurate statistical characterization of Galactic foregrounds is crucial for extracting cosmological information from CMB polarization data. However, the complexity of the interstellar medium leads to non-Gaussian structures that cannot be fully captured by traditional summary statistics, like the power spectrum. On the other hand, simulation and machine-learning approaches, while informative,...

14. Self-supervised framework for component separation in the submillimeter sky

Victor Bonjean (LPENS)

26/11/2026 09:20

We present a self-supervised framework to simultaneously reconstruct the different components of the submillimeter sky. The framework offers flexibility in the choice of emission models, including nonlinear models with spatially varying spectral parameters, such as the spectral index β in dust-emission models. Instrumental effects and constraints can also be incorporated into the...

10. Extragalactic CO as a CMB foreground: an analytic halo model for the CO auto-spectrum and its correlation with the CIB

Giorgia Zagatti (University of Ferrara)

26/11/2026 09:40

Rotational lines of carbon monoxide (CO) emitted by star-forming galaxies are redshifted into the frequency bands of CMB experiments. Because these bands are broad, many transitions emitted over a wide redshift range add up to a continuum-like signal that is strongly correlated with the cosmic infrared background (CIB). Current predictions of this foreground rely mostly on simulations. I will...

1. Towards cross-correlations between the CMB and the 21cm signal

Adélie Gorce (IAS, Université Paris-Saclay)

26/11/2026 10:00

Because they probe two different, complementary aspects of the same question of cosmic reionisation (where is the neutral gas for one, and where are the free electrons for the other), the high-redshift 21cm signal and CMB secondary anisotropies such as the kSZ and Thomson screening are highly complementary. Their cross-correlation has been shown in many works to be a promising observable for...