7 mai 2019
Astrophysics Departement-CEA Saclay
Fuseau horaire Europe/Paris

Weak Lensing with Lyman-alpha forest surveys

7 mai 2019, 10:50
20m
Astrophysics Departement-CEA Saclay

Astrophysics Departement-CEA Saclay

Orme des Merisiers, Batiment 709 91191 Gif sur Yvette Salle Cassini

Orateur

Mlle Sam Youles (University of Portsmouth)

Description

Weak gravitational lensing causes small displacements in the apparent angular position of quasars, and of the Lyman-alpha forests in their spectra. By measuring local distortions from the Lyman-alpha auto and quasar cross correlation functions, we propose to reconstruct the lensing mass distribution. With tests on eBOSS and DESI mocks, we expect to make S/N forecasts for these and future surveys.

Auteur principal

Mlle Sam Youles (University of Portsmouth)

Documents de présentation