2004A&A...423...75V


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.14CEST02:54:02

2004A&A...423...75V - Astronomy and Astrophysics, volume 423, 75-85 (2004/8-3)

The XMM-LSS survey. First high redshift galaxy clusters: Relaxed and collapsing systems.

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 E., JEAN C. and SURDEJ J.

Abstract (from CDS):

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 σV=867+80–60km/s, XLSSC 002 at z=0.772 and σV=524+267–116km/s and XLSSC 003 at z=0.839 and σV=780+137–75km/s. These three clusters have X-ray bolometric luminosities LX∼1-3x1044erg/s and temperatures 2-4keV, and consequently are less massive than previously known clusters at similar redshifts, but nevertheless they follow the low redshift scaling relations between LX, T and σv, 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.

Abstract Copyright:

Journal keyword(s): X-rays: galaxies: clusters - cosmology: large-scale structure of Universe - surveys

Nomenclature: Table 1: XLSSC N (Nos 1-5), XLSSU JHHMMSS.s+DDMMSS N=5.

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME XMM-LSS Field reg 02 18 00 -07 00.0           ~ 174 0
2 XMMXCS J0224.9-0348 ClG 02 24 57.1 -03 48 53           ~ 26 0
3 XLSSC 004 ClG 02 25 28.4 -05 06 57           ~ 4 0
4 XLSSU J022530.2-050713 X 02 25 30.2 -05 07 13           ~ 1 0
5 2XLSSd J022532.3-035512 ClG 02 25 32.48 -03 55 09.5           ~ 15 0
6 XLSSU J022709.7-041805 X 02 27 09.7 -04 18 05           ~ 2 0
7 RzCS 119 ClG 02 27 09.7 -04 18 05           ~ 28 1
8 2XLSSd J022738.1-031802 ClG 02 27 38.20 -03 17 56.9           ~ 21 0

    Equat.    Gal    SGal    Ecl

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2020.08.14-02:54:02

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