Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-05-12
Astron.Astrophys. 423 (2004) 75
Astronomy and Astrophysics
Astrophysics
11 pages, 8 figures; revised version accepted in A&A. The PDF article with full resolution figures is available from http://
Scientific paper
10.1051/0004-6361:20040162
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_V=867^{+80}_{-60} km/s, XLSSC 002 at z=0.772 and \sigma_V=524^{+267}_{-116} km/s and XLSSC 003 at z=0.839 and \sigma_V=780^{+137}_{-75} km/s. These three clusters have X-ray bolometric luminosities L_X \sim 1-3 \times 10^{44} erg/s 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_V, within the limits of the measurement errors. One of the clusters, XLSSC 004, is detected independently as an overdensity 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.
Adami Chris
Altieri Bruno
Andreon Stefano
Bolzonella Micol
Bremer Malcolm
No associations
LandOfFree
The XMM-LSS Survey. First high redshift galaxy clusters: relaxed and collapsing systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The XMM-LSS Survey. First high redshift galaxy clusters: relaxed and collapsing systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The XMM-LSS Survey. First high redshift galaxy clusters: relaxed and collapsing systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-202017