We characterise the distribution of quasars within dark matter halos using a direct measurement technique for the first time at redshifts as high as z∼1. Using the Planck Sunyaev-Zeldovich (SZ) catalogue for galaxy groups and the Sloan Digital Sky Survey (SDSS) DR12 quasar dataset, we assign host clusters/groups to the quasars and make a measurement of the mean number of quasars within dark matter halos as a function of halo mass. We find that a simple power-law fit of log⟨N⟩=(2.11±0.01)log(M)−(32.77±0.11) can be used to model the quasar fraction in dark matter halos. This suggests that the quasar fraction increases monotonically as a function of halo mass even to redshifts as high as z∼1.
@article{arxiv.1801.06522,
title = {Mean Occupation Function of High Redshift Quasars from the Planck Cluster Catalog},
author = {Priyanka Chakraborty and Suchetana Chatterjee and Alankar Dutta and Adam D. Myers},
journal= {arXiv preprint arXiv:1801.06522},
year = {2018}
}