The XXL Survey II. The bright cluster sample: catalogue and luminosity function
Journal article, 2016

Context. The XXL Survey is the largest survey carried out by the XMM-Newton satellite and covers a total area of 50 square degrees distributed over two fields. It primarily aims at investigating the large-scale structures of the Universe using the distribution of galaxy clusters and active galactic nuclei as tracers of the matter distribution. The survey will ultimately uncover several hundreds of galaxy clusters out to a redshift of similar to 2 at a sensitivity of similar to 10 (14) erg s (1) cm (2) in the [0.5-2] keV band. Aims. This article presents the XXL bright cluster sample, a subsample of 100 galaxy clusters selected from the full XXL catalogue by setting a lower limit of 3 x 10(-1)4 erg s(-1) cm(-2) on the source flux within a 1' aperture. Methods. The selection function was estimated using a mixture of Monte Carlo simulations and analytical recipes that closely reproduce the source selection process. An extensive spectroscopic follow-up provided redshifts for 97 of the 100 clusters. We derived accurate X-ray parameters for all the sources. Scaling relations were self-consistently derived from the same sample in other publications of the series. On this basis, we study the number density, luminosity function, and spatial distribution of the sample. Results. The bright cluster sample consists of systems with masses between M-500 = 7 x 10(13) and 3 x 10(14) M-circle dot, mostly located between z = 0.1 and 0.5. The observed sky density of clusters is slightly below the predictions from the WMAP9 model, and significantly below the prediction from the Planck 2015 cosmology. In general, within the current uncertainties of the cluster mass calibration, models with higher values of sigma(8) and/or Omega(M) appear more difficult to accommodate. We provide tight constraints on the cluster differential luminosity function and find no hint of evolution out to z similar to 1. We also find strong evidence for the presence of large-scale structures in the XXL bright cluster sample and identify five new superclusters. ELL GO, 1989, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, V70, P1

galaxies: clusters: intracluster medium

X-rays: galaxies: clusters

large-scale structure of Universe cosmological parameters

surveys

Author

F. Pacaud

University of Bonn

N. Clerc

Max Planck Institute

P. Giles

University of Bristol

C. Adami

Laboratoire d'Astrophysique de Marseille

T. Sadibekova

The French Alternative Energies and Atomic Energy Commission (CEA)

M. Pierre

The French Alternative Energies and Atomic Energy Commission (CEA)

B. Maughan

University of Bristol

M. Lieu

University of Birmingham

J. P. Le Fevre

The French Alternative Energies and Atomic Energy Commission (CEA)

S. Alis

Université Nice Sophia Antipolis (UNS)

Istanbul Universitesi

B. Altiéri

European Space Astronomy Centre (ESA)

F. Ardila

University of Florida

I. Baldry

Liverpool John Moores University

C. Benoist

Université Nice Sophia Antipolis (UNS)

M. Birkinshaw

University of Bristol

L. Chiappetti

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan

J. Democles

University of Birmingham

D. Eckert

University of Geneva

A. E. Evrard

University of Michigan

L. Faccioli

The French Alternative Energies and Atomic Energy Commission (CEA)

F. Gastaldello

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan

L. Guennou

University of KwaZulu-Natal

Cathy Horellou

Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics

A. Iovino

Osservatorio Astronomico di Brera

E. Koulouridis

The French Alternative Energies and Atomic Energy Commission (CEA)

National Observatory of Athens

V. Le Brun

Laboratoire d'Astrophysique de Marseille

C. Lidman

Australian Astronomical Observatory

J. Liske

European Southern Observatory (ESO)

S. Maurogordato

Université Nice Sophia Antipolis (UNS)

F. Menanteau

University of Illinois

M. Owers

Australian Astronomical Observatory

Macquarie University

B. Poggianti

Osservatorio Astronomico di Padova

D. Pomarede

The French Alternative Energies and Atomic Energy Commission (CEA)

E. Pompei

European Southern Observatory Santiago

T. J. Ponman

University of Birmingham

D. Rapetti

Ludwig-Maximilians-Universität München

Niels Bohr Institute

T. H. Reiprich

University of Bonn

G. P. Smith

University of Birmingham

R. Tuffs

Max Planck Institute

P. Valageas

Institut de Physique Theorique

I. Valtchanov

European Space Astronomy Centre (ESA)

J. Willis

University of Victoria

F. Ziparo

University of Birmingham

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 592 A2

Subject Categories

Astronomy, Astrophysics and Cosmology

Roots

Basic sciences

DOI

10.1051/0004-6361/201526891

More information

Latest update

9/6/2018 1