English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We use the Separate Universe technique to calibrate the dependence of linearand quadratic halo bias $b_1$ and $b_2$ on the local cosmic web environment ofdark matter haloes. We do this by measuring the response of halo abundances atfixed mass and cosmic web tidal anisotropy $\alpha$ to an infinite wavelengthinitial perturbation. We augment our measurements with an analytical frameworkdeveloped in earlier work which exploits the near-Lognormal shape of thedistribution of $\alpha$ and results in very high precision calibrations. Wepresent convenient fitting functions for the dependence of $b_1$ and $b_2$ on$\alpha$ over a wide range of halo mass for redshifts $0\leq z\leq1$. Ourcalibration of $b_2(\alpha)$ is the first demonstration to date of thedependence of non-linear bias on the local web environment. Motivated byprevious results which showed that $\alpha$ is the primary indicator of haloassembly bias for a number of halo properties beyond halo mass, we then extendour analytical framework to accommodate the dependence of $b_1$ and $b_2$ onany such secondary property which has, or can be monotonically transformed tohave, a Gaussian distribution. We demonstrate this technique for the specificcase of halo concentration, finding good agreement with previous results. Ourcalibrations will be useful for a variety of halo model analyses focusing ongalaxy assembly bias, as well as analytical forecasts of the potential forusing $\alpha$ as a segregating variable in multi-tracer analyses.

Separate Universe calibration of the dependence of halo bias on cosmic web anisotropy