J/ApJ/650/148 GOODS blue early-type galaxies (Lee+, 2006)
The nature of blue early-type galaxies in the GOODS fields.
Lee J.H., Lee M.G., Hwang H.S.
<Astrophys. J., 650, 148-165 (2006)>
=2006ApJ...650..148L 2006ApJ...650..148L
ADC_Keywords: Galaxies, photometry
Keywords: cosmology: observations - galaxies: elliptical and lenticular, cD -
galaxies: evolution - galaxies: formation - galaxies: structure
Abstract:
We present a study of the nature of the blue early-type galaxies
(BEGs) in the GOODS North and South fields using the GOODS archival
HST ACS data. Using visual inspection, we have selected 58 BEGs and
113 normal red early-type galaxies (REGs) in the sample of 1949
galaxies with spectroscopic redshifts. We find that the BEGs are
generally bluer, fainter, and less massive than the REGs, although a
few BEGs are exceptionally bright and massive. The number fraction of
BEGs to total early-type galaxies is almost constant (∼0.3) at z≤1.1.
In addition, we find that the sizes of the BEGs in a given redshift
bin decrease as redshift decreases. The BEGs look similar to the REGs
in the images and surface brightness profiles.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 66 58 Basic Properties of Blue Early-type Galaxies (BEGs)
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See also:
II/261 : GOODS initial results (Giavalisco+, 2004)
http://www.stsci.edu/ftp/science/goods/ : GOODS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- [LLH2006] Name (1)
10- 12 A3 --- --- [GDS]
14- 32 A19 --- GDS GOODS name (JHHMMSS.ss+DDMMSS.s)
34- 38 F5.3 --- z Spectroscopic redshift
40- 45 F6.3 mag Bmag B (F435W) AB AUTO magnitude
(max.error = 0.055)
47- 52 F6.3 mag Vmag V (F606W) AB AUTO magnitude
(max.error = 0.027)
54- 59 F6.3 mag imag i (F775W) AB AUTO magnitude
(max.error = 0.025)
61- 66 F6.3 mag Zmag Z (F850LP) AB AUTO magnitude
(max.error = 0.015)
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Note (1): Object mosaic ID number in the GOODS HST ACS official catalog,
V1.1. GN NNNNN for GOODS/HDF-N and GS NNNNN for GOODS/CDF-S
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Jul-2008