@article{beb50146f1024b3aa144644740eb1aa0,
title = "The XMM cluster survey: The halo occupation number of boss galaxies in X-ray clusters",
abstract = "We present a direct measurement of the mean halo occupation distribution (HOD) of galaxies taken from the eleventh data release (DR11) of the Sloan Digital Sky Survey-III Baryon Oscillation Spectroscopic Survey (BOSS). The HOD of BOSS low-redshift (LOWZ: 0.2 < z < 0.4) and Constant-Mass (CMASS: 0.43 < z<0.7) galaxies is inferred via their association with the dark matter haloes of 174 X-ray-selected galaxy clusters drawn from the XMM Cluster Survey (XCS). Halo masses are determined for each galaxy cluster based on X-ray temperature measurements, and range between log10(M180/M⊙) = 13 and 15. Our directly measured HODs are consistent with the HOD-model fits inferred via the galaxy-clustering analyses of Parejko et al. for the BOSS LOWZ sample and White et al. for the BOSS CMASS sample. Under the simplifying assumption that the other parameters that describe the HOD hold the values measured by these authors, we have determined a best-fitting alpha-index of 0.91 ± 0.08 and 1.27+0.03 -0.04 for the CMASS and LOWZ HOD, respectively. These alpha-index values are consistent with those measured by White et al. and Parejko et al. In summary, our study provides independent support for the HOD models assumed during the development of the BOSS mock-galaxy catalogues that have subsequently been used to derive BOSS cosmological constraints.",
author = "Nicola Mehrtens and {Kathy Romer}, A. and Nichol, {Robert C.} and Collins, {Chris A.} and Martin Sah{\'l}en and Rooney, {Philip J.} and Mayers, {Julian A.} and A. Bermeo-Hernandez and Martyn Bristow and Diego Capozzi and L. Christodoulou and Johan Comparat and Matt Hilton and Ben Hoyle and Kay, {Scott T.} and Liddle, {Andrew R.} and Mann, {Robert G.} and Karen Masters and Miller, {Christopher J.} and Parejko, {John K.} and Francisco Prada and Ross, {Ashley J.} and Schneider, {Donald P.} and Stott, {John P.} and Alina Streblyanska and Viana, {Pedro T.P.} and Martin White and Harry Wilcox and Idit Zehavi",
note = "Funding Information: NM acknowledges generous support from the Texas A and M University and the George P. and Cynthia Woods Institute for Fundamental Physics and Astronomy. AKR, RN, CAC, ARL are supported by the UK Science and Technology Facilities Council (STFC) grants ST/K00090/1, ST/K00090/1, STL000652/1, ST/L005573/1, ST/M000966/1 and ST/L000644/1. MS acknowledges support by the Templeton Foundation. PR acknowledges support from STFC and the University of Sussex Maths and Physical Sciences School. HW acknowledges support from SEPNet, the ICG and STFC. JPS acknowledges support from a Hintze Research Fellowship. PTPV acknowledges financial support by Funda{\c c} ~ao para a C{\^i}encia e a Tecnologia through project UID/FIS/04434/2013. We offer our thanks to members of the BOSS collaboration for their comments on the draft, including David Weinberg, Rachel Mandelbaum and Surhud More. Publisher Copyright: {\textcopyright} 2016 The Authors.",
year = "2016",
month = dec,
doi = "10.1093/mnras/stw2119",
language = "English (US)",
volume = "463",
pages = "1929--1943",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "2",
}