Cosmological constraints from the local X-ray luminosity function of the most X-ray-luminous galaxy clusters

AbstractRecent advances in X-ray and microwave observations have provided unprecedented insights into the structure and evolution of the hot X-ray emitting plasma from their cores to the virialization region in outskirts of galaxy clusters. Recent Sunyaev-Zel'dovich (SZ) surveys (ACT, Planck, SPT) have provided new cluster catalogs, significantly expanding coverage of the mass-redshift plane, whileChandraandXMM-NewtonX-ray follow-up programs have improved our understanding of cluster physics and evolution as well as the surveys themselves. However, the current cluster-based cosmological constraints are still limited by uncertainties in cluster astrophysics. In order to exploit the statistical power of the current and upcoming X-ray and microwave cluster surveys, it is critical to improve our understanding of the structure and evolution of the hot X-ray emitting intracluster medium (ICM). In this session, we discussed recent advances in observations and simulations of galaxy clusters, with highlights on (i) the evolution of ICM profiles and scaling relations, (ii) physical processes operating in the outskirts of galaxy clusters, and (iii) impact of mergers on the ICM structure in groups and clusters.

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The x-ray luminosity function of galaxy clusters

Astronomische Nachrichten ◽

10.1002/asna.19782990405 ◽

1978 ◽

Vol 299 (4) ◽

pp. 193-195

Author(s):

K.-H. Schmidt

Keyword(s):

Galaxy Clusters ◽

Luminosity Function ◽

X Ray

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X-ray Luminosity function of Active Galactic Nuclei in Galaxy clusters

10.1063/1.3293092 ◽

2009 ◽

Author(s):

Yuxuan Yang ◽

Joseph J. Mohr ◽

Tim O’Hara ◽

Sebastian Heinz ◽

Eric Wilcots

Keyword(s):

Active Galactic Nuclei ◽

Galaxy Clusters ◽

Luminosity Function ◽

Galactic Nuclei ◽

X Ray

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Cosmological Constraints from X-Ray Observations of Galaxy Clusters (Invited)

Multiwavelength Cosmology ◽

10.1007/0-306-48570-2_50 ◽

2004 ◽

pp. 239-246

Author(s):

Steven W. Allen

Keyword(s):

Galaxy Clusters ◽

X Ray ◽

Cosmological Constraints

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The XXL Survey

Astronomy and Astrophysics ◽

10.1051/0004-6361/201833238 ◽

2018 ◽

Vol 620 ◽

pp. A1 ◽

Cited By ~ 6

Author(s):

F. Marulli ◽

A. Veropalumbo ◽

M. Sereno ◽

L. Moscardini ◽

F. Pacaud ◽

...

Keyword(s):

Correlation Function ◽

Galaxy Clusters ◽

Cluster Number ◽

X Ray ◽

Mass Scaling ◽

Cosmological Constraints ◽

Density Peaks ◽

Point Correlation ◽

Point Correlation Function ◽

Number Counts

Context.Galaxy clusters trace the highest density peaks in the large-scale structure of the Universe. Their clustering provides a powerful probe that can be exploited in combination with cluster mass measurements to strengthen the cosmological constraints provided by cluster number counts.Aims.We investigate the spatial properties of a homogeneous sample of X-ray selected galaxy clusters from the XXL survey, the largest programme carried out by theXMM-Newtonsatellite. The measurements are compared to Λ-cold dark matter predictions, and used in combination with self-calibrated mass scaling relations to constrain the effective bias of the sample,beff, and the matter density contrast, ΩM.Methods.We measured the angle-averaged two-point correlation function of the XXL cluster sample. The analysed catalogue consists of 182 X-ray selected clusters from the XXL second data release, with median redshift ⟨z⟩ = 0.317 and median mass ⟨M500⟩≃ 1.3 × 1014M⊙. A Markov chain Monte Carlo analysis is performed to extract cosmological constraints using a likelihood function constructed to be independent of the cluster selection function.Results.Modelling the redshift-space clustering in the scale range 10 <r[h−1Mpc] < 40, we obtain ΩM= 0.27−0.04+0.06andbeff= 2.73−0.20+0.18.This is the first time the two-point correlation function of an X-ray selected cluster catalogue at such relatively high redshifts and low masses has been measured. The XXL cluster clustering appears fully consistent with standard cosmological predictions. The analysis presented in this work demonstrates the feasibility of a cosmological exploitation of the XXL cluster clustering, paving the way for a combined analysis of XXL cluster number counts and clustering.

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The NEP ROSAT Survey

Symposium - International Astronomical Union ◽

10.1017/s0074180900116079 ◽

1998 ◽

Vol 188 ◽

pp. 473-474 ◽

Cited By ~ 1

Author(s):

C.R. Mullis ◽

I.M. Gioia ◽

J.P. Henry

Keyword(s):

Galaxy Clusters ◽

Luminosity Function ◽

Survey Area ◽

Complete Sample ◽

X Ray ◽

Preliminary Results ◽

The North ◽

Sky Survey

The Rosat All-Sky Survey (Trümper 1991, Adv. Spce Res., 2, 241) has its largest exposure times, approaching 10 ks, at the ecliptic poles where the scan circles overlap. The North Ecliptic Pole (NEP) region covers a 9° X 9° field, and contains a total of 465 X-ray sources detected at > 4σ in the 0.1-2.4 keV. We are identifying all sources in the field. The principal derivative is a statistically complete sample of galaxy clusters appropriate for more fully characterizing X-ray Luminosity Function (XLF) evolution. We report preliminary results for two subregions which are identified to the 95% level. These subregions are observed to approximately the median NEP survey exposure. They enclose 16% of the survey area and contain 96 X-ray sources representing 21% of the total NEP. The typical mix of sources is consistent with the Einstein Extended Medium Sensisitivity Survey (EMSS; Gioia et al., 1990a, ApJS, 72, 567). In particular there are 56% AGN/ELG (59% in the EMSS), 25% stars (27% in the EMSS) and 14% clusters against 13% clusters in the EMSS.

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