We present constraints on cosmological parameters using maps from the last Planck data release (PR4). In particular, we detail an upgraded version of the cosmic microwave background likelihood, HiLLiPoP, based on angular power spectra and relying on a physical modelling of the foreground residuals in the spectral domain. This new version of the likelihood retains a larger sky fraction (up to...
In my recent publication (arXiv:2208.00188), I adopted a comprehensive approach to refine the constraints on the tensor-to-scalar ratio ($r$) and the tensor spectral index ($n_t$). This involved utilizing data from 10 datasets, including those from the BICEP/Keck Array 2015 and 2018, Planck releases 3 and 4, and the LIGO-Virgo-KAGRA collaboration. During this presentation, I will walk through...
Publicly available maps of Galactic CO emission form Planck are contaminated by noise and/or emission from other foregrounds (SZ clusters, IR and radio sources, Galactic dust). Using a modified version of GNILC, we post-process existing Planck CO maps to produce substantially cleaner full-sky maps for the first three rotational lines of Galactic CO.
We present new dust intensity and polarization maps obtained from Planck PR4 frequency maps.
Those maps are obtained using a modified version of GNILC that allows for better angular resolution in the final dust maps.
CMB power spectrum measurements from ground-based experiments are expected to match and surpass Planck-precision on cosmological parameters in the immediate future. With this constraining power comes great responsibility; the potential of detecting physics beyond the standard model demands a demonstrably robust analysis.
In this talk, I present a differentiable likelihood for CMB analysis...
During the Epoch of Reionisation (EoR), neutral hydrogen in the intergalactic medium can emit radiation through the 21cm hyperfine transition. The 21cm signal is a direct probe of this epoch, but a notoriously difficult observation to make.
On the other hand, the kinetic Sunyaev-Zel'dovich effect (pkSZ) is induced by the scattering of CMB photons with a medium of free electrons that possess a...
We present the first CMB-lensing galaxy cluster mass measurement using a combination of ground and space-based surveys (SPT-SZ and Planck). We measure the signal at 4.8 sigma, a significant gain with respect to measurements performed on the two individual datasets. In particular, we show that we take advantage of correlations between the scales observed by SPT-SZ and the scales observed by...
Galaxy clusters are a powerful cosmological probe: they track the latest evolution of large scale structure and are therefore fundamental for testing the cosmological model in the recent Universe.
CMB experiments represent a great opportunity for cosmology with galaxy clusters: due to the inverse Compton scattering of CMB photons by the hot gas of clusters, they are signal-limited, full-sky...
