Séminaire Univers / |
« Detecting neutrino mass using cosmology » |
Adrian Bayer |
Massive neutrinos suppress the growth of cosmic structure on small, non-linear, scales. There is thus much interest in using statistics beyond the power spectrum to tighten constraints on the neutrino mass by extracting additional information from these non-linear scales. In this talk, I will first explore the information in the matter field using the Quijote simulations. I will show how the matter power spectrum, halo mass function, and void size function can be combined to break degeneracies between cosmological parameters and give considerably tighter constraints on the neutrino mass compared to the power spectrum alone. I will also mention other higher-order statistics that have been shown to contain information regarding neutrino mass, for example the bispectrum and marked power spectrum. I will then explore how much of this non-linear information we can realistically expect to find in upcoming cosmological surveys which observe halos and weak lensing. |
mardi 8 février 2022 - 11:15 Salle du Conseil Institut d'Astrophysique de Paris |
Pages web du séminaire / Seminar's webpage |