2002A&A...394....1B


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.03CET21:56:55

2002A&A...394....1B - Astronomy and Astrophysics, volume 394, 1-5 (2002/10-4)

Optically-selected clusters at 0.8≲z≲1.3 in the EIS cluster survey.

BENOIST C., DA COSTA L., JORGENSEN H.E., OLSEN L.F., BARDELLI S., ZUCCA E., SCODEGGIO M., NEUMANN D., ARNAUD M., ARNOUTS S., BIVIANO A. and RAMELLA M.

Abstract (from CDS):

This paper presents preliminary results of a spectroscopic survey being conducted at the VLT of fields with optically-selected cluster candidates identified in the EIS I-band survey. Here we report our findings for three candidates selected for having estimated redshifts in the range z=0.8-1.1. New multi-band optical/infrared data were used to assign photometric redshifts to galaxies in the cluster fields and to select possible cluster members in preparation of the spectroscopic observations. Based on the available spectroscopic data, which includes 147 new redshifts for galaxies with IAB≲22-23, we confirm the detection of four density enhancements at a confidence level >99%. The detected concentrations include systems with redshifts z=0.81, z=0.95, z=1.14 and the discovery of the first optically-selected cluster at z=1.3. The latter system, with three concordant redshifts, coincides remarkably well with the location of a firm X-ray detection (>5σ) in a ∼80ksec XMM-Newton image taken as part of this program which will be presented in a future paper (Neumann et al. in prep.). The z>1 systems presented here are possibly the most distant identified so far by their optical properties alone.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: EIS0046-2930, EIS0533-2412, EIS0954-2023 - large-scale structure of Universe - cosmology: observations

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 [DSO99] EIS J0046-2930 ClG 00 46 27.6 -29 30 38           ~ 3 0
2 [OSD99] EIS J0046-2930 ClG 00 46 29.6 -29 30 57           ~ 3 0
3 ClG J0533-2412 ClG 05 33 40.3 -24 12 44           ~ 4 0
4 [SOD99] EIS J0954-2023 ClG 09 54 47.5 -20 23 55           ~ 2 0

    Equat.    Gal    SGal    Ecl

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2021.03.03-21:56:55

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