J/AJ/122/598 HDF-North serendipitously galaxies (Dawson+, 2001)
Serendipitously detected galaxies in the Hubble Deep Field.
Dawson S., Stern D., Bunker A.J., Spinrad H., Dey A.
<Astron. J. 122, 598 (2001)>
=2001AJ....122..598D 2001AJ....122..598D
ADC_Keywords: Galaxies, photometry ; Redshifts
Keywords: cosmology: observations - early universe -
galaxies: distances and redshifts - galaxies: high-redshift
Abstract:
We present a catalog of 74 galaxies detected serendipitously during a
campaign of spectroscopic observations of the Hubble Deep Field North
(HDF) and its environs. Among the identified objects are five
candidate Lyα emitters at z≳5, a galaxy cluster at z=0.85, and
a Chandra source with a heretofore undetermined redshift of z=2.011.
We report redshifts for 25 galaxies in the central HDF, 13 of which
had no prior published spectroscopic redshift. Of the remaining 49
galaxies, 30 are located in the single-orbit HDF flanking fields. We
discuss the redshift distribution of the serendipitous sample, which
contains galaxies in the range 0.10<z<5.77 with a median redshift of
z=0.85, and we present strong evidence for redshift clustering. By
comparing our spectroscopic redshifts with optical/IR photometric
studies of the HDF, we find that photometric redshifts are in most
cases capable of producing reasonable predictions of galaxy redshifts.
Finally, we estimate the line-of-sight velocity dispersion and the
corresponding mass and expected X-ray luminosity of the galaxy
cluster, we present strong arguments for interpreting the Chandra
source as an obscured active galactic nucleus, and we discuss in
detail the spectrum of one of the candidate z≳5 Lyα emitters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 95 25 Serendipitously detected galaxies in central HDF
table2.dat 103 49 Serendipitously detected galaxies outside
central HDF
notes.dat 100 21 Individual notes
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See also:
J/A+A/364/517 : HDF-N spiral and irregular galaxies (Rodighiero+, 2000)
J/AJ/120/2206 : NTT, HDF-S and HDF-N photometric redshifts (Fontana+, 2000)
J/ApJ/538/29 : HDF-N Caltech faint galaxy redshift survey. X. (Cohen+, 2000)
J/AJ/121/2895 : HDF-N Caltech faint galaxy redshift survey. XIII. (Cohen 2001)
J/ApJ/554/742 : Chandra Deep Survey of the HDF-N (Hornschemeier+, 2001)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- ID Identification number (1)
12 A1 --- n_ID Individual notes, detailed in "notes.dat"
13 A1 --- l_Imag Limit flag on Imag
14- 18 F5.2 mag Imag ? I814 magnitude from Williams et al.
(1996, Cat. J/AJ/12/1335)
20- 21 I2 h RAh [12] Right ascension (J2000)
23- 24 I2 min RAm Right ascension (J2000)
26- 31 F6.3 s RAs Right ascension (J2000)
33 A1 --- DE- Declination sign (J2000)
34- 35 I2 deg DEd [62] Declination (J2000)
37- 38 I2 arcmin DEm Declination (J2000)
40- 44 F5.2 arcsec DEs Declination (J2000)
46- 50 F5.3 --- z Redshift
51 A1 --- u_z Uncertainty flag on z
53 I1 --- SC [1/5] Spectral categories (3)
55- 62 A8 ---- Refs References, separated by comma, table1 only (4)
64- 65 A2 --- Loc Location, table2 only (5)
67-103 A37 --- Com Comments (6)
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Note (1): Identification numbers:
Table 1: [WBD96] from Williams et al. (1996, Cat. J/AJ/112/1335)
Table 2: [DSB2001], this paper
Note (3): Spectral categories:
1: Multiple features
2: Solo line with continuum; assume [O II] λ3727
3: Solo line with continuum break; assume Lyα
4: Solo line with no continuum; assess imaging, if available
5: Continuum break; assess continuum strength blueward of break
Note (4): References: list of spectroscopic redshifts already in the
literature. The following abbreviations are used:
C96 = Cohen et al. (1996, Cat. J/ApJ/471/L5)
C00 = Cohen et al. (2000, Cat. J/ApJ/538/29)
P97 = Phillips et al. (1997ApJ...489..543P 1997ApJ...489..543P)
S96 = Steidel et al. (1996AJ....112..352S 1996AJ....112..352S)
Note (5): Indicated galaxy is located in one of the HDF flanking field
observations (see Williams et al. 1996, Table 2):
OW = outer west, OE = outer east
IW = inner west, IE = inner east
SW = south west, SE = south east
NW = north west, NE = north east
Note (6): The oxygen emission lines are abbreviated:
[O II] = [O II] λ3727
[O III]a = [O III] λ4959
[O III]b = [O III] λ5007.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1 A1 --- Note Note number
4-100 A97 --- Text Text of the note
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History:
From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 31-Jan-2002