Article (Scientific journals)
The XMM-LSS survey - First high redshift galaxy clusters: Relaxed and collapsing systems
Valtchanov, I.; Pierre, M.; Willis, J. et al.
2004In Astronomy and Astrophysics, 423 (1), p. 75-85
Peer Reviewed verified by ORBi
 

Files


Full Text
Valtchanov_2004_A&A_423_75.pdf
Publisher postprint (1.93 MB)
Download

The authors thank EDP Sciences for their deposit authorization


All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
X-rays : galaxies : clusters; cosmology : large-scale structure of Universe; surveys
Abstract :
[en] We present five newly found galaxy clusters at z > 0.6 from the XMM Large-Scale Structure Survey (XMM-LSS). All five objects are extended X-ray sources in the XMM images. For three of them we have sufficient spectroscopically confirmed member galaxies that an estimate of the velocity dispersion is possible: XLSSC 001 at z = 0.613 and sigma(nu) = 867(-60)(+80) km s(-1), XLSSC 002 at z = 0.772 and sigma(nu) = 524(-116)(+267) km s(-1) and XLSSC 003 at z = 0.839 and sigma(V) = 780(-75)(+137) km s(-1). These three clusters have X-ray bolometric luminosities L-X similar to 1-3 x 10(44) erg s(-1) and temperatures 2-4 keV, and consequently are less massive than previously known clusters at similar redshifts, but nevertheless they follow the low redshift scaling relations between L-X, T and sigma(upsilon), within the limits of the measurement errors. One of the clusters, XLSSC 004, is detected independently as an over-density of galaxies of a colour R - z' = 1.4 that matches the redshift of the central galaxy z = 0.87, although it cannot unambiguously be confirmed by the spectroscopic observations alone. The highest redshift candidate cluster pertaining to this paper, XLSSC 005, is most likely a double cluster complex at a redshift around unity, associated with an extended X-ray source with probable substructure.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Valtchanov, I.
Pierre, M.
Willis, J.
Dos Santos, S.
Jones, L.
Andreon, S.
Adami, C.
Altieri, B.
Bolzonella, M.
Bremer, M.
Duc, P. A.
Gosset, Eric ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE)
Jean, C.
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
More authors (4 more) Less
Language :
English
Title :
The XMM-LSS survey - First high redshift galaxy clusters: Relaxed and collapsing systems
Publication date :
August 2004
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
423
Issue :
1
Pages :
75-85
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 22 July 2009

Statistics


Number of views
80 (1 by ULiège)
Number of downloads
77 (1 by ULiège)

Scopus citations®
 
48
Scopus citations®
without self-citations
31
OpenCitations
 
46

Bibliography


Similar publications



Contact ORBi