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: groups: general
X-rays: galaxies: clusters
galaxies: evolution
galaxies: clusters: general
galaxies: luminosity function, mass function
Författare
V. Guglielmo
Laboratoire d'Astrophysique de Marseille
Università di Padova
Osservatorio Astronomico 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
Istituto nazionale di astrofisica (INAF)
S. Ettori
INAF OAS Bologna
S. Fotoupoulou
Université de Genève
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 (ESAC)
I. Baldry
Liverpool John Moores University
M. Birkinshaw
University of Bristol
M. Bolzonella
INAF OAS Bologna
A. Bongiorno
Osservatorio Astronomico di Roma
M. Brown
Monash University
L. Chiappetti
Istituto nazionale di astrofisica (INAF)
S. Driver
University of Western Australia
University of St Andrews
A. Elyiv
Main Astronomical Observatory Nasu
Universita di Bologna
A. E. Evrard
University of Michigan
B. Garilli
Istituto nazionale di astrofisica (INAF)
M. Grootes
European Space Research and Technology Centre (ESA 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
Université de Genève
M. Pierre
Université Paris-Saclay
M. Plionis
Instituto Nacional de Astrofísica, Óptica y Electrońica
National Observatory of Athens
Aristotelio Panepistimio Thessalonikis
T. J. Ponman
University of Birmingham
A. Robotham
University of Western Australia
T. Sadibekova
Université Paris-Saclay
Uzbekistan Academy of Sciences
M. Scodeggio
Istituto nazionale di astrofisica (INAF)
M. Sereno
Universita di Bologna
INAF OAS Bologna
V. Smolcic
Sveučilište u Zagrebu
R. Tuffs
European Space Research and Technology Centre (ESA ESTEC)
I. Valtchanov
European Space Astronomy Centre (ESAC)
Cristian Vignali
Universita di Bologna
INAF OAS Bologna
J. Willis
University of Victoria
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 620 A7Ämneskategorier
Subatomär fysik
Analytisk kemi
Astronomi, astrofysik och kosmologi
DOI
10.1051/0004-6361/201730709