Year: 2016
Type: article
Abstract: We study the impact of the often neglected lensing contribution to galaxy number counts on the E g statistics which is used to constrain deviations from GR. This contribution affects both the galaxy-galaxy and the convergence-galaxy spectra, while it is larger for the latter. At higher redshifts probed by upcoming surveys, for instance at z = 1.5, neglecting this term induces an error of (25–40)% in the spectra and therefore on the E g statistics which is constructed from the combination of the two. Moreover, including it, renders the E g statistics scale and bias-dependent and hence puts into question its very objective.
Authors: Azadeh Moradinezhad Dizgah, Ruth Durrer
Institution: University of Geneva
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2344737771