ADC/CDS Standard Document for Catalog:/journal_tables/AJ/122/598/
ADC/CDS Standard Document for Catalog:| 1. Use the ADC Data Viewer Suite to visualize the data. |
|
| 2. Get the data files via anonymous FTP. (See Note.) |
|
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 (SIMBAD/NED BibCode)
================================================================================
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 Ly{alpha} 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 Ly{alpha} emitters.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 95 25 Serendipitously detected galaxies
in the central HDF
table2.dat 103 49 Serendipitously detected galaxies
outside of the central HDF
--------------------------------------------------------------------------------
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
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- ID Identification number (1)
12 A1 --- n_ID Individual note (2)
13 A1 --- l_Imag Limit flag on Imag
14- 18 F5.2 mag Imag ? I_814_ 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 ---- Ref References, separated by comma, table1 only (4)
64- 65 A2 --- Loc Location, table2 only (5)
67-103 A37 --- Com Comments (6)
--------------------------------------------------------------------------------
Note (1): Identification numbers:
Table 1: [WBD96] from Williams et al. (1996, Cat. <J/AJ/112/1335>)
Table 2: [DSB2001], this paper
Note (2): Individual notes:
a: Listed without a redshift as H36485_1317 in Cohen et al.
(2000, Cat. <J/ApJ/538/29>). Redshift identification tentative;
weak detection.
b: Redshift identification tentative. Weak detection consistent with
[O II] {lambda}3727 interpretation of solo line; possible
detection of very faint additional lines is roughly consistent
with [O III] {lambda}5007 interpretation.
c: Redshift identification tentative. Weak detection. Object colors
(see W96, Williams et al., 1996, Cat. <J/AJ/112/1335>) are not
consistent with Ly{alpha} interpretation of solo line;
[O II] {lambda}3727 interpretation suggests presence of
[O III] {lambda}5007 at {lambda}_obs_=7415{AA} which is not
detected; [O III] {lambda}5007 interpretation suggests presence
of H{alpha} at {lambda}_obs_=7232{PAA}, which may be very weakly
detected.
d: Listed as NICMOS No. 850 with zphot=2.40 in Dickinson et al.
(2000ApJ...531..624D).
e: The data given are for 4-948.1111, a daughter object likely to be
a part of the system formed by 4-948.2, 4-948.11, 4-948.111,
4-948.112, 4-948.1112, 4-948.11111, and 4-948.11112. This system
is distinct from that formed by 4-948.0, 4-948.1, and 4-948.12,
which has a redshift of z=0.585 (Phillips et al.,
1997ApJ...489..543P; Cohen et al. 2000, Cat. <J/ApJ/538/29>).
g: Indicated galaxy falls outside of the Hawaii 2.2 m I-band image of
Barger et al. (1999AJ....117..102B); the identification was made
in our own 70 minute R-band image obtained with ESI (where
possible); I_AB_ magnitudes are not available.
h: Optical ID for X-ray source CXOHDFN J123635.6+621424
(Hornschemeier et al., 2001, Cat. <J/ApJ/554/742>).
See Section 5.4 of the paper.
i: Redshift identification tentative. See discussion of SC 3 in
Section 3.2 of the paper
Note (3): Spectral categories:
1: Multiple features
2: Solo line with continuum; assume [O II] {lambda}3727
3: Solo line with continuum break; assume Ly{alpha}
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)
S96 = Steidel et al. (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] {lambda}3727
[O III]a = [O III] {lambda}4959
[O III]b = [O III] {lambda}5007.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
================================================================================
(End) James Marcout, Patricia Bauer [CDS] 31-Jan-2002