Projects per year
Abstract
We determine the error introduced in a joint halo model analysis of galaxy-galaxy lensing and galaxy clustering observables when adopting the standard approximation of linear halo bias. Considering the Kilo-Degree Survey, we forecast that ignoring the non-linear halo bias would result in up to 5σ offsets in the recovered cosmological parameters describing structure growth, S8, and the matter density parameter, Ωm. We include the scales 10−1.3<rp /h−1Mpc<10 in the data vector, and the direction of these offsets are shown to depend on the freedom afforded to the halo model through other nuisance parameters. We conclude that a beyond-linear halo bias correction must therefore be included in future cosmological halo model analyses of large-scale structure observables on non-linear scales.
Original language | English |
---|---|
Pages (from-to) | 2612-2623 |
Number of pages | 12 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 515 |
Issue number | 2 |
Early online date | 6 Jul 2022 |
DOIs | |
Publication status | Published - 1 Sept 2022 |
Keywords / Materials (for Non-textual outputs)
- cosmological parameters
- large-scale structure of Universe
- methods: analytical
Fingerprint
Dive into the research topics of 'The halo model with beyond-linear halo bias: unbiasing cosmological constraints from galaxy-galaxy lensing and clustering'. Together they form a unique fingerprint.-
-
GLOBE: Global Lensing Observations to go Beyond Einstein (027451/1)
1/11/15 → 31/10/21
Project: Research