J/ApJ/581/844 Radio and Infrared observations of EROs (Smail+, 2002)
The diversity of Extremely Red Objects.
Smail I., Owen F.N., Morrison G.E., Keel W.C., Ivison R.J., Ledlow M.J.
<Astrophys. J., 581, 844-864 (2002)>
=2002ApJ...581..844S 2002ApJ...581..844S
ADC_Keywords: Clusters, galaxy ; Infrared sources ; Photometry, infrared ;
Radio sources
Keywords: cosmology: observations -
galaxies: clusters: individual (A851, Cl 0939+4713) -
galaxies: evolution - galaxies: starburst - infrared: galaxies
Abstract:
We present the results from a sensitive multiwavelength analysis of
the properties of extremely red objects (EROs). Our analysis employs
deep RIzJHK photometry of an 8.5'x8.5' region to select a sample of 68
EROs with (R-K)≥5.3 and brighter than K=20.5 (5σ). We
combine this photometric data set with an extremely deep 1.4GHz radio
map of the field obtained from the VLA. This map reaches a 1σ
limiting flux density of 3.5µJy , making it the deepest 1.4GHz map
taken, and is sensitive enough to detect an active galaxy with
L1.4≳1023W/Hz at z>1.
Description:
The radio image of A851 comprises a combination of A, B, C, and D
configuration observations from the National Radio Astronomy
Observatory's VLA taken at 1.4GHz between 1996 and 2000.
Our primary near-infrared imaging data set comes from wide-field
images in JHK taken with the KPNO 2.1 m telescope on the nights of
2001 January 4-11. On the nights of 1999 February 28, March 0102, and
March 1516 we completed a K-band mosaic of 5x5 pointings using the
UFTI imager on UKIRT On 2000 December 1112 we used the INGRID
near-infrared imager in the WHT to obtain a J-band image of the cluster
core.
The optical imaging to complement our deep near-infrared data sets was
obtained from three facilities. We have two wide-field imaging data
sets of this region.
The first comes from Suprime-Cam on Subaru (courtesy of T. Kodama) and
consists of very deep RI imaging of a 27'x27' field centered on the
cluster core, taken on the nights of 2001 January 21-22.
We also have obtained similarly a wide-field KPNO 4m image in the z
band, obtained on the night of 2001 January 25/26.
Finally, an HST/WFPC2 mosaic of A851 has been observed in the F702W
filter, but we will not use the HST imaging in our analysis.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 129 68 ERO Catalog
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See also:
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- 5 I5 --- [SOM2002] Sequential number
6 A1 --- n_[SOM2002] [gh] Note on [SOM2002] (1)
8- 9 I2 h RAh Right ascension (J2000.0)
11- 12 I2 min RAm Right ascension (J2000.0)
14- 19 F6.3 s RAs Right ascension (J2000.0)
21 A1 --- DE- Declination sign (J2000.0)
22- 23 I2 deg DEd Declination (J2000.0)
25- 26 I2 arcmin DEm Declination (J2000.0)
28- 32 F5.2 arcsec DEs Declination (J2000.0)
34- 38 F5.2 mag Kmag Total K magnitude
40 A1 --- l_R-K Limit flag on R-K
41- 44 F4.2 mag R-K Aperture R-K colour index
46 A1 --- l_S1.4GHz Limit flag on S1.4GHz
47- 51 F5.1 uJy S1.4GHz Radio flux at 1.4GHz (or 3σ limit)
53 A1 --- l_Rapmag Limit flag on Rapmag
54- 58 F5.2 mag Rapmag 3" diameter aperture R magnitude
60- 62 F3.2 mag e_Rapmag ? rms uncertainty on Rapmag
64 A1 --- l_Iapmag Limit flag on Iapmag
65- 69 F5.2 mag Iapmag 3" diameter aperture I magnitude
71- 73 F3.2 mag e_Iapmag ? rms uncertainty on Iapmag
75 A1 --- l_Zapmag Limit flag on Zapmag
76- 80 F5.2 mag Zapmag 3" diameter aperture Z magnitude
82- 84 F3.2 mag e_Zapmag ? rms uncertainty on Zapmag
86 A1 --- l_Japmag Limit flag on Japmag
87- 91 F5.2 mag Japmag 3" diameter aperture J magnitude
93- 95 F3.2 mag e_Japmag ? rms uncertainty on Japmag
97 A1 --- l_Hapmag Limit flag on Hapmag
98-102 F5.2 mag Hapmag 3" diameter aperture H magnitude
104-106 F3.2 mag e_Hapmag ? rms uncertainty on Hapmag
108 A1 --- l_Kapmag Limit flag on Kapmag
109-113 F5.2 mag Kapmag 3" diameter aperture K magnitude
115-117 F3.2 mag e_Kapmag ? rms uncertainty on Kapmag
119 A1 --- SED [DEB] Best-fitting model SED (2)
121 A1 --- Morph1 [CIF] Visual morphology from high-resolution
K-band imaging (3)
122 A1 --- n_Morph1 [def] Note on Morph1 (4)
123 A1 --- --- [/]
124 A1 --- Morph2 [CIF] Visual morphology from high-resolution
R-band imaging (3)
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Note (1): Individual notes:
g: M star
h: transient source
Note (2): Best-fitting model SED:
D: dusty
E: evolved
B: badly fitted
Note (3): Morphology:
C: compact/regular
I: disky, disturbed or amorphous
F: too faint to classify
Note (4): Notes on morphology:
d: SMM J09429+4658 (Smail et al., 1999MNRAS.308.1061S 1999MNRAS.308.1061S).
e: ERO Cl 0939+4713 A (Persson et al. 1993, in The Evolution of
Galaxies and Their Environments, NASA Tech. Report, ed. M. Shull
& H. Thronson (Washington, DC: GPO), 78).
f: ERO 333 (Smail et al., 1999ApJ...525..609S 1999ApJ...525..609S).
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History:
From electronic version of the journal
(End) Patricia Bauer [CDS] 09-Feb-2004