The halo model with beyond-linear halo bias: unbiasing cosmological constraints from galaxy–galaxy lensing and clustering

• DOI: 10.1093/mnras/stac1858
• Publication Date: 2022-07-06T22:07:21Z
• Authors: Constance Mahony; Andrej Dvornik; Alexander Mead; Catherine Heymans; Marika Asgari; Hendrik Hildebrandt; Hironao Miyatake; Takahiro Nishimichi; Robert Reischke
• Keywords: Halo effect

We determine the error introduced in a joint halo model analysis of galaxy-galaxy lensing and galaxy clustering observables when adopting standard approximation linear bias. Considering Kilo-Degree Survey, we forecast that ignoring non-linear bias would result up to 5$\sigma$ offsets recovered cosmological parameters describing structure growth, $S_8$, matter density parameter, $\Omega_{\mathrm{m}}$. include scales $10^{-1.3}<r_{\rm{p}} \ / h^{-1}\, \mathrm{Mpc}<10$ data vector, direction these are shown depend on freedom afforded through other nuisance parameters. conclude beyond-linear correction must therefore be included future analyses large-scale scales.