Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/127518
Title: | A critical analysis of high-redshift, massive, galaxy clusters. Part I |
Author: | Hoyle, Ben Jiménez, Raúl (Jiménez Tellado) Verde, Licia Hotchkiss, Shaun |
Keywords: | Cúmuls de galàxies Cosmologia Clusters of galaxies Cosmology |
Issue Date: | Feb-2012 |
Publisher: | Institute of Physics (IOP) |
Abstract: | We critically investigate current statistical tests applied to high redshift clusters of galaxies in order to test the standard cosmological model and describe their range of validity. We carefully compare a sample of high-redshift, massive, galaxy clusters with realistic Poisson sample simulations of the theoretical mass function, which include the effect of Eddington bias. We compare the observations and simulations using the following statistical tests: the distributions of ensemble and individual existence probabilities (in the > M, > z sense), the redshift distributions, and the 2d Kolmogorov-Smirnov test. Using seemingly rare clusters from Hoyle et al. (2011), and Jee et al. (2011) and assuming the same survey geometry as in Jee et al. (2011, which is less conservative than Hoyle et al. 2011), we find that the ( > M, > z) existence probabilities of all clusters are fully consistent with ΛCDM. However assuming the same survey geometry, we use the 2d K-S test probability to show that the observed clusters are not consistent with being the least probable clusters from simulations at > 95% confidence, and are also not consistent with being a random selection of clusters, which may be caused by the non-trivial selection function and survey geometry. Tension can be removed if we examine only a X-ray selected sub sample, with simulations performed assuming a modified survey geometry. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1088/1475-7516/2012/02/009 |
It is part of: | Journal of Cosmology and Astroparticle Physics, 2012, vol. 2012, num. 009 |
URI: | http://hdl.handle.net/2445/127518 |
Related resource: | https://doi.org/10.1088/1475-7516/2012/02/009 |
ISSN: | 1475-7516 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Publicacions de projectes de recerca finançats per la UE |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
612884.pdf | 499.13 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.