J/ApJ/699/1610 Spitzer survey of submillimeter galaxies (Hainline+, 2009)
A mid-infrared imaging survey of submillimeter-selected galaxies with the
Spitzer Space Telescope.
Hainline L.J., Blain A.W., Smail I., Frayer D.T., Chapman S.C.,
Ivison R.J., Alexander D.M.
<Astrophys. J., 699, 1610-1632 (2009)>
=2009ApJ...699.1610H 2009ApJ...699.1610H
ADC_Keywords: Galaxies, IR ; Radio sources ; Redshifts
Keywords: galaxies: evolution - galaxies: formation - galaxies: high-redshift -
infrared: galaxies
Abstract:
We present Spitzer-IRAC and MIPS mid-IR observations of a sample
of 76 radio-detected submillimeter-selected galaxies (SMGs) with
spectroscopic redshifts, the largest such sample published to date.
From our data, we find that IRAC colors of SMGs are much more uniform
as compared with rest-frame UV and optical colors, and z>1.5 SMGs tend
to be redder in their mid-IR colors than both field galaxies and
lower-z SMGs. However, the IRAC colors of the SMGs overlap those of
field galaxies sufficiently that color-magnitude and color-color
selection criteria suggested in the literature to identify SMG
counterparts produce ambiguous counterparts within an 8" radius in
20%-35% of cases. We use a rest-frame J-H versus H-K color-color
diagram and a S24/S8.0 versus S8.0/S4.5 color-color diagram to
determine that 13%-19% of our sample are likely to contain active
galactic nuclei which dominate their mid-IR emission.
Description:
In our survey, we image the fields targeted in the SMG spectroscopic
survey of Chapman et al. (2005, Cat. J/ApJ/622/772). The sample
consists of 76 SCUBA galaxies with spectroscopic redshifts in seven
different "blank" fields on the sky: CFRS-03, Lockman Hole East,
Hubble Deep Field-North(HDF-N)/GOODS-N, SSA 13, CFRS-14, ELAIS-N2,
and SSA 22.
We have obtained observations with the IRAC and MIPS instrument on
Spitzer for all seven SMG fields in all four IRAC wavelength channels
(3.6, 4.5, 5.8, and 8.0um and in 24 and 70um for MIPS).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 115 76 IRAC Flux Densities for Chapman et al.
(2005, Cat. J/ApJ/622/772) SMG Sample
table5.dat 103 65 MIPS 24 micron and 70 micron Results for Chapman
et al. (2005, Cat. J/ApJ/622/772) SMG Sample
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See also:
J/MNRAS/380/199 : SCUBA Half-Degree Extragalactic Survey. III (Ivison+, 2007)
J/MNRAS/358/149 : HDFN SCUBA Super-map. III (Pope+, 2005)
J/ApJ/622/772 : Redshift survey of submillimeter galaxies (Chapman+, 2005)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [SMM]
4- 22 A19 --- SMM Chapman et al. 2005, Cat. J/ApJ/622/772 ID
(<[CBS2005] SMM JHHMMSS.ss+DDMMSS.s> in Simbad)
24- 26 A3 --- n_SMM Individual notes (1)
28- 32 F5.3 --- zsp Spectroscopic redshift
34- 35 I2 h RAh IRAC hour of Right Ascension (J2000) (2)
37- 38 I2 min RAm IRAC minute of Right Ascension (J2000)
40- 44 F5.2 s RAs IRAC second of Right Ascension (J2000)
46 A1 --- DE- IRAC sign of the Declination (J2000) (2)
47- 48 I2 deg DEd IRAC degree of Declination (J2000)
50- 51 I2 arcmin DEm IRAC arcminute of Declination (J2000)
53- 56 F4.1 arcsec DEs IRAC arcsecond of Declination (J2000)
57 A1 --- s [s] indicates position from SCUBA name (2)
59 A1 --- l_S3.6 Limit flag on S3.6
60- 64 F5.1 uJy S3.6 ? Spitzer/IRAC 3.6 micron band flux density
66- 69 F4.1 uJy e_S3.6 ? Uncertainty in S3.6
71 A1 --- f_S3.6 [d] Flag on S3.6 (3)
73 A1 --- l_S4.5 Limit flag on S4.5
74- 78 F5.1 uJy S4.5 ? Spitzer/IRAC 4.5 micron band flux density
80- 83 F4.1 uJy e_S4.5 ? Uncertainty in S4.5
85 A1 --- f_S4.5 [d] Flag on S4.5 (3)
87 A1 --- l_S5.8 Limit flag on S5.8
88- 93 F6.1 uJy S5.8 ? Spitzer/IRAC 5.8 micron band flux density
95- 99 F5.1 uJy e_S5.8 ? Uncertainty in S5.8
101 A1 --- f_S5.8 [d] Flag on S5.8 (3)
103 A1 --- l_S8.0 Limit flag on S8.0
104-109 F6.1 uJy S8.0 ? Spitzer/IRAC 8.0 micron band flux density
111-115 F5.1 uJy e_S8.0 ? Uncertainty in S8.0
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Note (1): Flag as follows:
a = This galaxy was identified by Chapman et al. (2005, Cat. J/ApJ/622/772)
as a low-z lens unassociated with the SMG. It has been excluded from the
analysis presented here.
b = The redshift of this SMG has been revised in Menendez-Delmestre et al.
(2009ApJ...699..667M 2009ApJ...699..667M).
c = This SMG lies on the edges of the IRAC images in all fields but is
clearly detected.
e = The redshift of this SMG has been revised in Pope et al.
(2008ApJ...675.1171P 2008ApJ...675.1171P).
f = The optical counterpart for this SMG is offset from the radio
counterpart, so we have allowed a larger IRAC position offset than the
nominal tolerance of 1.1".
g = This SMG is detected in the 3.6 micron channel of IRAC but falls within
a column affected by column pull-down and with resulting large
uncertainties cause it to be formally undetected.
h = There is an ambiguity about object SMMJ105219.15+571858.4 which should
be SMMJ105225.79+571906.4 as in Chapman et al. (2005,
Cat. J/ApJ/622/772). Object not corrected in CDS tables.
i = Misprint on object name in Chapman et al. (2005, Cat. J/ApJ/622/772)
which gives SMMJ141800.40+512820.3 and not SMMJ141800.40+522820.3.
Note (2): Unless flagged, position of the IRAC counterpart coming from the
bluest wavelength of detection, since for the 3.6 and 4.5um IRAC bands
absolute pointing refinement was successful, and we expect the
uncertainties in the positions to be smaller.
s = position of that particular galaxy is not covered in our IRAC
image mosaics (in that case, given position is from the SMM name).
Note (3):
d = This SMG has a near neighbor contaminating the 4" photometry aperture.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [SMM]
4- 22 A19 --- SMM Chapman et al. 2005, Cat. J/ApJ/622/772 ID
24- 28 A5 --- n_SMM Individual notes (1)
30- 31 I2 h RA24h ? 24um image hour of Right Ascension (J2000)
33- 34 I2 min RA24m ? 24um image minute of Right Ascension (J2000)
36- 40 F5.2 s RA24s ? 24um image second of Right Ascension (J2000)
42 A1 --- DE24- 24um image sign of the Declination (J2000)
43- 44 I2 deg DE24d ? 24um image degree of Declination (J2000)
46- 47 I2 arcmin DE24m ? 24um image arcminute of Declination (J2000)
49- 52 F4.1 arcsec DE24s ? 24um image arcsecond of Declination (J2000)
54- 55 I2 h RA70h ? 70um image hour of Right Ascension (J2000)
57- 58 I2 min RA70m ? 70um image minute of Right Ascension (J2000)
60- 64 F5.2 s RA70s ? 70um image second of Right Ascension (J2000)
66 A1 --- DE70- 70um image sign of the Declination (J2000)
67- 68 I2 deg DE70d ? 70um image degree of Declination (J2000)
70- 71 I2 arcmin DE70m ? 70um image arcminute of Declination (J2000)
73- 76 F4.1 arcsec DE70s ? 70um image arcsecond of Declination (J2000)
78 A1 --- l_S24 Limit flag on S24
80- 85 F6.1 uJy S24 ? Spitzer/MIPS 24 micron band flux density
87- 91 F5.1 uJy e_S24 ? Uncertainty in S24
93 A1 --- l_S70 Limit flag on S70
95- 99 F5.1 mJy S70 ? Spitzer/MIPS 70 micron band flux density
101-103 F3.1 mJy e_S70 ? Uncertainty in S70
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Note (1): Flag as follows:
a = This galaxy was identified by Chapman et al. (2005, Cat. J/ApJ/622/772)
as a low-z lens unassociated with the SMG. It has been excluded from the
analysis presented here.
b = This SMG has a mid-IR spectrum from IRS published in Menendez-Delmestre
et al. (2007ApJ...655L..65M 2007ApJ...655L..65M).
c = This SMG has a mid-IR spectrum from IRS published in Menendez-Delmestre
et al. (2009ApJ...699..667M 2009ApJ...699..667M).
d = This SMG has a mid-IR spectrum from IRS published in Valiante et al.
(2007ApJ...660.1060V 2007ApJ...660.1060V).
e = This SMG is detected at 24 micron but is blended with another nearby
source.
f = The 24 micron measurement for this SMG has been taken from Ivison et al.
(2007, Cat. J/MNRAS/380/199).
g = This SMG has a mid-IR spectrum from IRS published in Pope et al.
(2008ApJ...675.1171P 2008ApJ...675.1171P).
h = The 24 micron measurement for this SMG has been taken from Pope et al.
(2006MNRAS.370.1185P 2006MNRAS.370.1185P).
i = The optical counterpart for this SMG is offset from the radio
counterpart so we have allowed a larger offset from the radio position
than the nominal 2" at 24 micron.
j = This SMG has been allowed a larger offset from the radio position at
24 micron due to the difference in resolution of the radio images and
the 24 micron images.
k = There is an ambiguity about object SMMJ105219.15+571858.4 which should
be SMMJ105225.79+571906.4 as in Chapman et al. (2005,
Cat. J/ApJ/622/772). Object not corrected in CDS tables.
l = Misprint on object name in Chapman et al. (2005, Cat. J/ApJ/622/772)
which gives SMMJ141800.40+512820.3 and not SMMJ141800.40+522820.3.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 11-Jul-2011