The XXL Survey: XXII. the XXL-North spectrophotometric sample and galaxy stellar mass function in X-ray detected groups and clusters
Artikel i vetenskaplig tidskrift, 2018

Context. The fraction of galaxies bound in groups in the nearby Universe is high (50% at z ∼ 0). Systematic studies of galaxy properties in groups are important in order to improve our understanding of the evolution of galaxies and of the physical phenomena occurring within this environment. Aims. We have built a complete spectrophotometric sample of galaxies within X-ray detected, optically spectroscopically confirmed groups and clusters (G&C), covering a wide range of halo masses at z ≤ 0.6. Methods. In the context of the XXL survey, we analyse a sample of 164 G&C in the XXL-North region (XXL-N), at z ≤ 0.6, with a wide range of virial masses (1.24 × 1013 ≤ M500,scal(Mo) ≤ 6.63 × 1014) and X-ray luminosities ((2.27 × 1041 ≤ L500,scalXXL(erg-s-1) ≤ 2.15 × 1044)). The G&C are X-ray selected and spectroscopically confirmed. We describe the membership assignment and the spectroscopic completeness analysis, and compute stellar masses. As a first scientific exploitation of the sample, we study the dependence of the galaxy stellar mass function (GSMF) on global environment. Results. We present a spectrophotometric characterisation of the G&C and their galaxies. The final sample contains 132 G&C, 22 111 field galaxies and 2225 G&C galaxies with r-band magnitude <20. Of the G&C, 95% have at least three spectroscopic members, and 70% at least ten. The shape of the GSMF seems not to depend on environment (field versus G&C) or X-ray luminosity (used as a proxy for the virial mass of the system). These results are confirmed by the study of the correlation between mean stellar mass of G&C members and L500,scalXXL. We release the spectrophotometric catalogue of galaxies with all the quantities computed in this work. Conclusions. As a first homogeneous census of galaxies within X-ray spectroscopically confirmed G&C at these redshifts, this sample will allow environmental studies of the evolution of galaxy properties.

galaxies: evolution

galaxies: luminosity function, mass function

galaxies: clusters: general

X-rays: galaxies: clusters

galaxies: groups: general

Författare

V. Guglielmo

Osservatorio Astronomico di Padova

Laboratoire d'Astrophysique de Marseille

Università di Padova

B. M. Poggianti

Osservatorio Astronomico di Padova

B. Vulcani

University of Melbourne

Osservatorio Astronomico di Padova

C. Adami

Laboratoire d'Astrophysique de Marseille

F. Gastaldello

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan

S. Ettori

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna

S. Fotoupoulou

Universite de Geneve

E. Koulouridis

Université Paris-Saclay

M. E. Ramos-Ceja

Universität Bonn

P. Giles

University of Bristol

Sean L. McGee

University of Birmingham

B. Altiéri

European Space Astronomy Centre (ESA)

I. Baldry

Liverpool John Moores University

M. Birkinshaw

University of Bristol

M. Bolzonella

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna

A. Bongiorno

Osservatorio Astronomico di Roma

M. Brown

Monash University

L. Chiappetti

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan

S. Driver

University of Western Australia

University of St Andrews

A. Elyiv

Universita di Bologna

Main Astronomical Observatory Nasu

A. E. Evrard

University of Michigan

B. Garilli

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan

M. Grootes

ESTEC

L. Guennou

University of KwaZulu-Natal

A. Hopkins

Australian Astronomical Observatory

Cathy Horellou

Chalmers, Rymd-, geo- och miljövetenskap, Onsala rymdobservatorium

A. Iovino

Osservatorio Astronomico di Brera

C. Lidman

Australian Astronomical Observatory

J. Liske

Universität Hamburg

S. Maurogordato

Université Nice Sophia Antipolis (UNS)

M. Owers

Macquarie University

F. Pacaud

Universität Bonn

S. Paltani

Universite de Geneve

M. Pierre

Université Paris-Saclay

M. Plionis

National Observatory of Athens

Instituto Nacional de Astrofisica Optica y Electronica

Aristotle University of Thessaloniki

T. J. Ponman

University of Birmingham

A. Robotham

University of Western Australia

T. Sadibekova

Uzbekistan Academy of Sciences

Université Paris-Saclay

M. Scodeggio

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan

M. Sereno

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna

Universita di Bologna

V. Smolcic

Sveučilište u Zagrebu

R. Tuffs

ESTEC

I. Valtchanov

European Space Astronomy Centre (ESA)

Cristian Vignali

INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Bologna

Universita di Bologna

J. Willis

University of Victoria

Astronomy and Astrophysics

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

Vol. 620 A7

Ämneskategorier

Subatomär fysik

Analytisk kemi

Astronomi, astrofysik och kosmologi

DOI

10.1051/0004-6361/201730709

Mer information

Senast uppdaterat

2018-12-07