2005A&A...443..831H


Query : 2005A&A...443..831H

2005A&A...443..831H - Astronomy and Astrophysics, volume 443, 831-839 (2005/12-1)

Surface density of extremely red objects with R-J ≥ 5.

HEMPEL A., HERBST T.M. and THOMPSON D.J.

Abstract (from CDS):

We present the results of a wide-field survey for extremely red objects (EROs), based on J and R band imaging. The survey covers 2.89 deg2, consisting of 50 single fields, each approximately 210-arcmin2 in size. This survey provides a sample of 60 extended objects with a colour of R-J≥5 and J band magnitudes more than 10σ above background (18mag≤J≤20mag). Thirty five of these objects have been detected in both J and R-band. We derive a surface density for such EROs of 5.7±0.1x10–3arcmin–2, which is about seven times lower than for galaxies with R-K≥6. Stellar population models suggest that these EROs are massive galaxies with an old stellar population in a redshift range of 1.4≤z ≤3.0. For this scenario, we estimate the co-moving volume density to be (9.57±1.24)x10–6Mpc–3.

Abstract Copyright:

Journal keyword(s): Galaxy: evolution - galaxies: high-redshift - galaxies: elliptical and lenticular, cD

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HD 256 ** 00 07 18.2658367200 -17 23 13.173158760   6.311 6.203 7.36   A3Vn_sh 105 0
2 * 5 Cet EB* 00 08 12.0955513656 -02 26 51.740585628   7.58 6.22     K2IIICNIVp 117 0

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2022.08.19-04:08:57

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