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arXiv · 1905.10375

Measuring the growth of structure by matching dark matter haloes to galaxies with VIPERS and SDSS

Benjamin R. Granett·Ginevra Favole·Antonio D. Montero-Dorta·Enzo Branchini·Luigi Guzzo·Sylvain de la Torre
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Abstract

We test the history of structure formation from redshift 1 to today by matching galaxies from VIPERS and SDSS with dark matter haloes in the MultiDark SMDPL N-body simulation. We first show that the standard subhalo abundance matching (SHAM) recipe implemented with MultiDark characterizes the clustering of galaxies well both at redshift 0 for SDSS and at redshift 1 for VIPERS. This is an important validation of the SHAM model at high redshift. We then remap the simulation timesteps to test alternative growth histories and infer the growth index $\gamma=0.6\pm0.3$. This analysis demonstrates the power of using N-body simulations to forward model galaxy surveys for cosmological inference.

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Benjamin R. Granett, Ginevra Favole, Antonio D. Montero-Dorta, Enzo Branchini, Luigi Guzzo, Sylvain de la Torre. 2019-05-24. Measuring the growth of structure by matching dark matter haloes to galaxies with VIPERS and SDSS. https://doi.org/10.1093/mnras/stz2152

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