The XXL Survey: XXII. the XXL-North spectrophotometric sample and galaxy stellar mass function in X-ray detected groups and clusters
Journal article, 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
galaxies: luminosity function, mass function
X-rays: galaxies: clusters
galaxies: clusters: general
galaxies: evolution
Author
V. Guglielmo
Istituto nazionale di astrofisica (INAF)
University of Padua
Laboratoire d'Astrophysique de Marseille
B. M. Poggianti
Istituto nazionale di astrofisica (INAF)
B. Vulcani
Istituto nazionale di astrofisica (INAF)
University of Melbourne
C. Adami
Laboratoire d'Astrophysique de Marseille
F. Gastaldello
Istituto nazionale di astrofisica (INAF)
S. Ettori
Istituto nazionale di astrofisica (INAF)
S. Fotoupoulou
University of Geneva
E. Koulouridis
University Paris-Saclay
M. E. Ramos-Ceja
University of Bonn
P. Giles
University of Bristol
Sean L. McGee
University of Birmingham
B. Altiéri
European Space Agency (ESA)
I. Baldry
Liverpool John Moores University
M. Birkinshaw
University of Bristol
M. Bolzonella
Istituto nazionale di astrofisica (INAF)
A. Bongiorno
Osservatorio Astronomico di Roma
M. Brown
Monash University
L. Chiappetti
Istituto nazionale di astrofisica (INAF)
S. Driver
University of St Andrews
University of Western Australia
A. Elyiv
University of Bologna
Main Astronomical Observatory Nasu
A. E. Evrard
University of Michigan
B. Garilli
Istituto nazionale di astrofisica (INAF)
M. Grootes
European Space Agency (ESA)
L. Guennou
University of KwaZulu-Natal
A. Hopkins
Australian Astronomical Observatory
Cathy Horellou
Chalmers, Space, Earth and Environment, Onsala Space Observatory
A. Iovino
Istituto nazionale di astrofisica (INAF)
C. Lidman
Australian Astronomical Observatory
J. Liske
University of Hamburg
S. Maurogordato
Université Nice Sophia Antipolis (UNS)
M. Owers
Macquarie University
F. Pacaud
University of Bonn
S. Paltani
University of Geneva
M. Pierre
University Paris-Saclay
M. Plionis
National Institute of Astrophysics, Optics and Electronics
Aristotle University of Thessaloniki
National Observatory of Athens
T. J. Ponman
University of Birmingham
A. Robotham
University of Western Australia
T. Sadibekova
Uzbekistan Academy of Sciences
University Paris-Saclay
M. Scodeggio
Istituto nazionale di astrofisica (INAF)
M. Sereno
University of Bologna
Istituto nazionale di astrofisica (INAF)
V. Smolcic
University of Zagreb
R. Tuffs
European Space Agency (ESA)
I. Valtchanov
European Space Agency (ESA)
Cristian Vignali
University of Bologna
Istituto nazionale di astrofisica (INAF)
J. Willis
University of Victoria
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 620 A7Subject Categories (SSIF 2011)
Subatomic Physics
Analytical Chemistry
Astronomy, Astrophysics and Cosmology
DOI
10.1051/0004-6361/201730709