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

Understand

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 $\gamma=0.6\pm0.3$.