J/ApJ/653/1004 Galaxies at 1.4≲z≲3.0 in GOODS-North Field (Reddy+, 2006)
A spectroscopic survey of redshift 1.4≲z≲3.0 galaxies in the
GOODS-North Field: survey description, catalogs, and properties.
Reddy N.A., Steidel C.C., Erb D.K., Shapley A.E., Pettini M.
<Astrophys. J., 653, 1004-1026 (2006)>
=2006ApJ...653.1004R 2006ApJ...653.1004R
ADC_Keywords: Surveys ; Redshifts ; Galaxies, photometry ; Photometry, infrared
Keywords: cosmology: observations - galaxies: active - galaxies: evolution -
galaxies: high-redshift - galaxies: starburst -
galaxies: stellar content
Abstract:
We present the results of a spectroscopic survey with LRIS-B on Keck
of more than 280 star-forming galaxies and AGNs at redshifts
1.4~<z~<3.0 in the GOODS-N field. Candidates are selected by their
UnGR colors using the "BM/BX" criteria to target redshift 1.4~<z~<2.5
galaxies and the LBG criteria to target redshift z∼3 galaxies;
combined these samples account for ∼25%-30% of the R and Ks band
counts to R=25.5 and Ks(AB)=24.4, respectively. The 212 BM/BX galaxies
and 74 LBGs constitute the largest spectroscopic sample of galaxies at
z>1.4 in GOODS-N. Extensive multiwavelength data allow us to
investigate the stellar populations, stellar masses, bolometric
luminosities (Lbol), and extinction z∼2 of galaxies. Deep Chandra and
Spitzer data indicate that the sample includes galaxies with a wide
range in Lbol (∼1010 to >1012L☉) and 4 orders of magnitude
in dust obscuration (Lbol/LUV).
Description:
The imaging, photometry, color selection, and spectroscopic
observations of galaxies in the fields of our survey are described in
several other papers published by our group (Steidel et al. 2003, Cat.
J/ApJ/592/728, 2004ApJ...604..534S 2004ApJ...604..534S; Adelberger et al.,
2004ApJ...607..226A 2004ApJ...607..226A; Reddy et al., 2005ApJ...633..748R 2005ApJ...633..748R). Specific
details regarding the GOODS-N optical imaging are presented in Reddy
et al. (2005ApJ...633..748R 2005ApJ...633..748R).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 160 388 GOODS-N UnGR galaxies with spectroscopic redshifts
table3.dat 71 254 Stellar Population Parameters
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See also:
J/ApJ/592/728 : Lyman break galaxies at redshift z∼3 (Steidel+, 2003)
J/AJ/127/3137 : Hawaii redshifts in the ACS-GOODS region (Cowie+, 2004)
J/AJ/127/3121 : TKRS catalog of GOODS-North Field (Wirth+, 2004)
J/ApJ/653/1027 : TKRS/GOODS-N Field galaxies (Weiner+, 2006)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Name (G1)
12- 13 I2 h RAh Right ascension (J2000.0)
15- 16 I2 min RAm Right ascension (J2000.0)
18- 22 F5.2 s RAs Right ascension (J2000.0)
24 A1 --- DE- Declination sign (J2000.0)
25- 26 I2 deg DEd Declination (J2000.0)
28- 29 I2 arcmin DEm Declination (J2000.0)
31- 34 F4.1 arcsec DEs Declination (J2000.0)
36 A1 --- u_zem [:] Uncertainty flag on zem
37- 41 F5.3 --- zem ? Emission redshift (2)
43 A1 --- u_zabs [:] Uncertainty flag on zabs
44- 48 F5.3 --- zabs ? Absorption redshift (3)
50- 53 A4 --- Mcl Morphological class (4)
55- 59 F5.2 mag Rmag ? R magnitude in AB unit (G2)
61- 65 F5.2 mag G-R ? G-R colour index (G2)
66 A1 --- l_Un-G Limit flag, upper limits given for galaxies
undetected in Un
67- 71 F5.2 mag Un-G ? Un-G colour index (G2)
73 A1 --- l_Jmag Limit flag on Jmag
74- 78 F5.2 mag Jmag ? J magnitude (5)
80 A1 --- l_Ksmag Limit flag on Ksmag
81- 85 F5.2 mag Ksmag ? Ks magnitude (5)
87- 91 F5.2 mag m3.6 ? magnitude at 3.6um
93- 96 F4.2 mag e_m3.6 ? rms uncertainty on m3.6
98-102 F5.2 mag m4.5 ? magnitude at 4.5um
104-107 F4.2 mag e_m4.5 ? rms uncertainty on m4.5
109-113 F5.2 mag m5.8 ? magnitude at 5.8um
115-118 F4.2 mag e_m5.8 ? rms uncertainty on m5.8
120-124 F5.2 mag m8.0 ? magnitude at 8.0um
126-129 F4.2 mag e_m8.0 ? rms uncertainty on m8.0
131-135 F5.1 uJy F24 ? flux at 24um
137-140 F4.1 uJy e_F24 ? rms uncertainty on F24
142-160 A19 --- Notes Notes (6)
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Note (2): Emission-line redshift. An entry with a colon indicates that the
redshift is uncertain. A blank entry indicates that an emission-line
redshift could not be measured.
Note (3): Absorption-line redshift. An entry with a colon indicates that
the redshift is uncertain. A blank entry indicates that an
absorption-line redshift could not be measured.
Note (4): Source type, either galaxy (GAL), AGN, QSO, or STAR. The
distinction between QSO and AGN classification is based on the line
widths, as described in Steidel et al. (2002ApJ...576..653S 2002ApJ...576..653S), where an
object is classified as a QSO if it has any emission line with FWHM
>2000km/s. AGNs identified using other means (X-ray or mid-IR
emission) are discussed in Sect. 6.2.
Note (5): A blank entry indicates that the object did not lie in the region
with near-IR imaging.
Note (6): Galaxies in common with the LBG survey in the HDF-N are indicated
by their names (S03-XXX) as given in Steidel et al. (2003, Cat.
J/ApJ/592/728). Galaxies with X-ray counterparts within are indicated
by their names (B03-XXX) in the spectroscopic follow-up to the Chandra
2 Ms survey by Barger et al. (2003, Cat. J/AJ/126/632). Galaxies
satisfying the distant red galaxy (DRG) criteria of Franx et al.
(2003ApJ...587L..79F 2003ApJ...587L..79F) are indicated by DRG.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Name (G1) (1)
12- 16 F5.3 --- z Redshift
18- 21 F4.2 mag E(B-V)i Reddening E(B-V) calculated with
constant formation
23- 26 I4 Myr Age.i Age calculated with constant formation
28- 31 I4 solMass/yr SFR.i Stellar Formation Rate calculated with
constant formation
33- 38 F6.3 10+10solMass Mass.i Stellar mass calculated with constant
formation
40- 43 I4 Myr tau Best-fit star formation history
decay timescale (2)
45- 49 F5.2 mag E(B-V)tau Reddening E(B-V) calculated with tau
51- 54 I4 Myr Age.tau Age calculated with tau
56- 59 I4 solMass/yr SFR.tau Stellar Formation Rate calculated
with tau
61- 66 F6.3 10+10solMass Mass.tau Stellar mass calculated with tau
68- 71 A4 --- Note [IRAC Ks] Notes (3)
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Note (1): We did not fit the stellar populations of galaxies that had no
data longward of R band, had uncertain redshifts, or are identified as
AGN/QSO from their optical spectra. We also do not present SED
parameters for those galaxies with optical and IRAC photometry
inconsistent with a simple stellar population (these sources had
large χ2>10) or those sources with 8 or 24um excesses.
Note (2): In some cases, a model with constant star formation (infinity)
provided the best fit.
Note (3): Objects with large Ks band residuals are indicated (i.e., those
sources whose Ks band measurement lies more than 3σ away from
the best-fit stellar population). MD31 is the only directly detected
X-ray source that shows no optical signatures of an AGN, has a
relatively faint 24um flux, and has photometry that is consistent with
a stellar population. The IRAC photometry for BX1267 may suffer from a
deblending problem, and these (IRAC) data were not used in the SED fit.
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Global notes:
Note (G1): Nomenclature note:
Names S03-XXX are identified as SAS-LBG HDF-XXX in Simbad.
All other objects are identified as [RSE2006] Name in Simbad
Note (G2): Filters are:
Un = identitical to SDSS u' filter
R = bandpass centered at 683nm, FWHM = 125nm
G = similar to SDSS g' (same effective wavelength but slightly narrower)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 31-Jul-2008