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ICCUB SEMINAR – Lensing convergence in galaxy clustering in LCDM and beyondd

ICCUB SEMINAR - Lensing convergence in galaxy clustering in LCDM and beyondd
Start
11-16-2017
End
11-16-2017
Speaker
Eleonora Villa
Affiliation
SISSA
Host
ICCUB - IEEC
Place
DAM Seminar Room, 7th floor

ABSTRACT


We study the impact of neglecting lensing magnification in galaxy clustering analyses for future galaxy surveys, considering the ΛCDM model and two extensions: massive neutrinos and modifications of General Relativity. Our study focuses on the biases on the constraints and on the estimation of the cosmological parameters. Our results show that the information present in the lensing contribution does improve the constraints on the modified gravity parameters whereas the lensing constraining power is negligible on the ΛCDM parameters. On the other hand the estimation is biased for all the parameters if lensing is not taken into account. This effect is particularly significant for the modified gravity parameters. Our findings show the importance of including lensing in galaxy clustering analyses for testing General Relativity and to constrain the parameters which describe its modifications.
Contact email
secretariacientifica(a)icc.ub.edu