Colloque national Action Dark Energy 2021 - 5ème édition

On the impact of lensing magnification on galaxy clustering analysis

Non programmé

20m

Amphithéâtre Hermite (Institut Henri Poincaré)

Contribué

Orateur

Michel-Andrès Breton (Laboratoire d'Astrophysique de Marseille)

Description

In this talk I will discuss about the impact of magnification bias on the determination of the growth rate from redshift-space clustering. We use a the RayGal suite of $N$-body simulations that accounts for the fully non-linear structure formation and perform realistic galaxy clustering analyses, similarly as in observations, in different regime of magnification bias. We investigate a minimal model to account for the magnification effect on the multipole moments of the redshift-space correlation function, and study the accuracy with which the the growth rate of structure parameter can be recovered.