A Weak Lensing Study of X-ray Groups in the Cosmos Survey: Form and Evolution of the Mass-Luminosity Relation - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue The Astrophysical Journal Année : 2010

A Weak Lensing Study of X-ray Groups in the Cosmos Survey: Form and Evolution of the Mass-Luminosity Relation

Alexie Leauthaud
Alexis Finoguenov
Jean-Paul Kneib
James E. Taylor
  • Fonction : Auteur
Richard Massey
Jason Rhodes
Kevin Bundy
Jeremy Tinker
  • Fonction : Auteur
Matthew R. George
  • Fonction : Auteur
Peter Capak
Anton M. Koekemoer
  • Fonction : Auteur
David E. Johnston
  • Fonction : Auteur
Yu-Ying Zhang
  • Fonction : Auteur
Nico Cappelluti
  • Fonction : Auteur
Richard S. Ellis
  • Fonction : Auteur
Martin Elvis
  • Fonction : Auteur
Stefania Giodini
  • Fonction : Auteur
Catherine Heymans
  • Fonction : Auteur
Simon Lilly
  • Fonction : Auteur
Alexandre Réfrégier
  • Fonction : Auteur
Mara Salvato
  • Fonction : Auteur
Nick Scoville
  • Fonction : Auteur
George Smoot
  • Fonction : Auteur
Masayuki Tanaka
  • Fonction : Auteur
Ludovic van Waerbeke
  • Fonction : Auteur
Melody Wolk
  • Fonction : Auteur

Résumé

Measurements of X-ray scaling laws are critical for improving cosmological constraints derived with the halo mass function and for understanding the physical processes that govern the heating and cooling of the intracluster medium. In this paper, we use a sample of 206 X-ray-selected galaxy groups to investigate the scaling relation between X-ray luminosity (L X) and halo mass (M 200) where M 200 is derived via stacked weak gravitational lensing. This work draws upon a broad array of multi-wavelength COSMOS observations including 1.64 degrees2 of contiguous imaging with the Advanced Camera for Surveys to a limiting magnitude of I F814W = 26.5 and deep XMM-Newton/Chandra imaging to a limiting flux of 1.0 × 10-15 erg cm-2 s-1 in the 0.5-2 keV band. The combined depth of these two data sets allows us to probe the lensing signals of X-ray-detected structures at both higher redshifts and lower masses than previously explored. Weak lensing profiles and halo masses are derived for nine sub-samples, narrowly binned in luminosity and redshift. The COSMOS data alone are well fit by a power law, M 200 vprop (L X)α, with a slope of α = 0.66 ± 0.14. These results significantly extend the dynamic range for which the halo masses of X-ray-selected structures have been measured with weak gravitational lensing. As a result, tight constraints are obtained for the slope of the M-L X relation. The combination of our group data with previously published cluster data demonstrates that the M-L X relation is well described by a single power law, α = 0.64 ± 0.03, over two decades in mass, M 200 ~ 1013.5-1015.5 h -1 72 M sun. These results are inconsistent at the 3.7σ level with the self-similar prediction of α = 0.75. We examine the redshift dependence of the M-L X relation and find little evidence for evolution beyond the rate predicted by self-similarity from z ~ 0.25 to z ~ 0.8.

Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by AURA Inc, under NASA contract NAS 5-26555; also based on data collected at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan; the XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA; the European Southern Observatory under Large Program 175.A-0839, Chile; Kitt Peak National Observatory, Cerro Tololo Inter-American Observatory, and the National Optical Astronomy Observatory, which are operated by the Association of Universities for Research in Astronomy, Inc. (AURA) under cooperative agreement with the National Science Foundation; the National Radio Astronomy Observatory which is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc ; and the Canada-France-Hawaii Telescope with MegaPrime/MegaCam operated as a joint project by the Canada-France-Hawaii-Telescope Corporation, CEA/DAPNIA, the National Research Council of Canada, the Canadian Astronomy Data Centre, the Centre National de la Recherche Scientifique de France, TERAPIX and the University of Hawaii.

Dates et versions

hal-03646197 , version 1 (19-04-2022)

Identifiants

Citer

Alexie Leauthaud, Alexis Finoguenov, Jean-Paul Kneib, James E. Taylor, Richard Massey, et al.. A Weak Lensing Study of X-ray Groups in the Cosmos Survey: Form and Evolution of the Mass-Luminosity Relation. The Astrophysical Journal, 2010, 709, pp.97-114. ⟨10.1088/0004-637X/709/1/97⟩. ⟨hal-03646197⟩
15 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More