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• W3041477178 abstract "ABSTRACT We use the Separate Universe technique to calibrate the dependence of linear and quadratic halo bias b1 and b2 on the local cosmic web environment of dark matter haloes. We do this by measuring the response of halo abundances at fixed mass and cosmic web tidal anisotropy α to an infinite wavelength initial perturbation. We augment our measurements with an analytical framework developed in earlier work that exploits the near-lognormal shape of the distribution of α and results in very high precision calibrations. We present convenient fitting functions for the dependence of b1 and b2 on α over a wide range of halo mass for redshifts 0 ≤ z ≤ 1. Our calibration of b2(α) is the first demonstration to date of the dependence of non-linear bias on the local web environment. Motivated by previous results that showed that α is the primary indicator of halo assembly bias for a number of halo properties beyond halo mass, we then extend our analytical framework to accommodate the dependence of b1 and b2 on any such secondary property that has, or can be monotonically transformed to have, a Gaussian distribution. We demonstrate this technique for the specific case of halo concentration, finding good agreement with previous results. Our calibrations will be useful for a variety of halo model analyses focusing on galaxy assembly bias, as well as analytical forecasts of the potential for using α as a segregating variable in multitracer analyses." @default.
• W3041477178 created "2020-07-16" @default.
• W3041477178 creator A5054229114 @default.
• W3041477178 creator A5070144522 @default.
• W3041477178 date "2020-10-10" @default.
• W3041477178 modified "2023-10-17" @default.
• W3041477178 title "Separate Universe calibration of the dependence of halo bias on cosmic web anisotropy" @default.
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• W3041477178 doi "https://doi.org/10.1093/mnras/staa2999" @default.
• W3041477178 hasPublicationYear "2020" @default.
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