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arXiv · 1901.06045

BE-HaPPY: Bias Emulator for Halo Power Spectrum including massive neutrinos

David Valcin·Francisco Villaescusa-Navarro·Licia Verde·Alvise Raccanelli
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Abstract

We study the clustering properties of dark matter halos in real- and redshift-space in cosmologies with massless and massive neutrinos through a large set of state-of-the-art N-body simulations. We provide quick and easy-to-use prescriptions for the halo bias on linear and mildly non-linear scales, both in real and redshift space, which are valid also for massive neutrinos cosmologies. Finally we present a halo bias emulator,$\textbf{BE-HaPPY}$, calibrated on the N-body simulations, which is fast enough to be used in the standard Markov Chain Monte Carlo approach to cosmological inference. For a fiducial standard $\Lambda$CDM cosmology $\textbf{BE-HaPPY}$ provides percent or sub-percent accuracy on the scales of interest (linear and well into the mildly non-linear regime), meeting therefore for the halo-bias the accuracy requirements for the analysis of next-generation large--scale structure surveys.

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David Valcin, Francisco Villaescusa-Navarro, Licia Verde, Alvise Raccanelli. 2019-01-18. BE-HaPPY: Bias Emulator for Halo Power Spectrum including massive neutrinos. https://doi.org/10.1088/1475-7516%2F2019%2F12%2F057

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