J/ApJ/586/765 HST K-selected extremely red galaxies (Yan+, 2003)
Hubble Space Telescope WFPC2 morphologies of K-selected extremely red galaxies.
Yan L., Thompson D.
<Astrophys. J. 586, 765 (2003)>
=2003ApJ...586..765Y 2003ApJ...586..765Y
ADC_Keywords: Galaxies, IR ; Morphology ; Photometry, infrared
Keywords: galaxies: elliptical and lenticular, cD -
galaxies: fundamental parameters - galaxies: high-redshift -
galaxies: spiral
Abstract:
We selected 115 extremely red objects (EROs) from deep Hubble Space
Telescope (HST) WFPC2 archive data combined with ground-based K-band
images, with (F814W-Ks)≥4, K-band signal-to-noise ratio ≥5, and a
median limiting Ks magnitude of ∼18.7, over a corresponding area of
228 arcmin2, for a morphological study of the ERO galaxy population.
The survey covered a total of ∼409-arcmin2 over 77 separate WFPC2
fields. This is the first complete sample of bright EROs with
high-resolution HST morphologies.
Description:
The data used in this survey come from two sources. Deep,
high-resolution HST/WFPC2 F814W images from archival data,
specifically from the Medium Deep Survey (MDS; Griffith et al.,
1994ApJ...435L..19G 1994ApJ...435L..19G; Ratnatunga, Griffiths, & Ostrander,
1999AJ....118...86R 1999AJ....118...86R), are used for the optical data set. Images in the
Ks band were obtained from the Palomar 60 inch telescope for a total
of 77 MDS fields.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 33 77 Observations
table2.dat 96 115 Extremely Red Galaxies
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See also:
J/ApJ/581/844 : Radio and Infrared observations of EROs (Smail+, 2002)
J/MNRAS/330/1 : HST observations of Extremely Red Objects (Smith+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- MDS MDS field designation
9- 10 I2 --- ERO ERO number
12- 16 F5.2 mag KsLim Ks limiting magnitude (1)
18- 21 F4.2 arcsec FWHM FWHM
23- 27 I5 s ExpTKs Ks band exposure time
29- 33 I5 s ExpTF814W F814W band exposure time
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Note (1): The Ks limiting magnitudes are derived from the sky noise in the
center of each infrared mosaic image and are quoted as 5σ
limits for a point source within an aperture diameter 2.5 times
the FWHM of the seeing.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [YT2003] Sequential number
5- 13 A9 --- MDS MDS identifier, [YT2003] "MDS" in Simbad (1)
15- 16 I2 h RAh Right ascension (J2000)
18- 19 I2 min RAm Right ascension (J2000)
21- 27 F7.4 s RAs Right ascension (J2000)
29 A1 --- DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 41 F6.3 arcsec DEs Declination (J2000)
43- 47 F5.2 mag Ksmag Ks magnitude
49- 52 F4.2 mag I-Ks I-Ks colour index
54- 57 F4.1 mag e_Ksmag rms uncertainty on Ks
59- 62 F4.1 mag e_Imag ?=99.9 rms uncertainty on I
64- 65 A2 --- YT YT morphological class (2)
67- 68 A2 --- MT MDS morphological class (2)
70- 96 A27 --- Com Comments
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Note (1): This identifier is written in Simbad as
[YT2003] aaaNN-NNN, [YT2003] aNaNN-NNN, [YT2003] aNaaN-NNN,
[YT2003] aNNNN-NNN or [YT2003] aaNNN-NNN
Note (2): Morphological class as follows:
BD = bulge-dominated system
B = pure bulge galaxy
DB = disky systems with some evidence of a bulge
D = disk
U = unclassifiable
G = not specified in the paper
S = Stellar core
ID = disky irregular
IU = irregular unclassifiable
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 22-May-2003