J/A+A/440/61 FORS spectroscopy of HDFS galaxies (Rigopoulou+, 2005)
FORS spectroscopy of galaxies in the Hubble Deep Field South.
Rigopoulou D., Vacca W.D., Berta S., Franceschini A., Aussel H.
<Astron. Astrophys. 440, 61 (2005)>
=2005A&A...440...61R 2005A&A...440...61R
ADC_Keywords: Surveys ; Galaxies, photometry ; Photometry, UBVRIJKLMNH ;
Redshifts ; Spectroscopy
Keywords: cosmology: observations - surveys -
galaxies: luminosity function, mass function - galaxies: starburst
Abstract:
We present low resolution multi-object spectroscopy of an I-band
magnitude limited (IAB∼23-23.5) sample of galaxies located in an
area centered on the Hubble Deep Field-South (HDFS). The observations
were obtained using the Focal Reducer/low dispersion Spectrograph
(FORS) on the ESO Very Large Telescope. Thirty-two primary
spectroscopic targets in the HST-WFPC2 HDFS were supplemented with
galaxies detected in the Infrared Space Observatory's survey of the
HDFS and the ESO Imaging Deep Survey to comprise a sample of 100
galaxies for spectroscopic observations. Based on detections of
several emission lines, such as [OII]3727, Hβ and [OIII]5007, or
of other spectroscopic features, we measured accurate redshifts for 50
objects in the central HDFS and flanking fields. The redshift range of
the current sample of galaxies is 0.6-1.2, with a median redshift of
1.13 (at I∼23.5 not corrected for completeness). The sample is
dominated by starburst galaxies with only a small fraction of
ellipticals (∼10%). For the emission line objects, the extinction
corrected [OII]3727 line strengths yield estimates of star formation
rates in the range 0.5-30M☉/yr. We used the present data to
derive the [OII]3727 luminosity function up to redshift of 1.2. When
combined with [OII]3727 luminosity densities for the local and high
redshift Universe, our results confirm the steep rise in the star
formation rate (SFR) to z∼1.3.
Description:
Table 2 : IDs and photometric data for the spectroscopic targets.
For each galaxy coordinates (J2000), IDs and U,B,V,R,I,J,H,K
photometry is given.
Table 3: spectroscopic redshifts for each target together with the
detected emission lines.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 99 94 Identifications and photometry
table3.dat 51 100 Spectroscopic redshifts and line detections
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See also:
J/A+A/379/740 : ESO Imaging Survey (EIS) (Arnouts+, 2001)
J/ApJ/548/127 : Hubble Deep Field-South region (Teplitz+ 2001)
J/AJ/119/486 : HDF-S: STIS imaging (Gardner+, 2000)
J/AJ/120/2747 : HDF-South WFPC2 observations (Casertano+, 2000)
J/AJ/122/2190 : HDF-South multicolor observations (Vanzella+, 2001)
J/AJ/122/2205 : HDF-South K photometric redshift catalog (Rudnick+, 2001)
J/AJ/126/1208 : UVBI magnitudes and redshifts in HDF-South (Sawicki+, 2003)
J/ApJ/538/493 : HDF-South NICMOS field (Yahata+, 2000)
http://archive.stsci.edu/pub/hdf-south/version1 : WFPC2 flanking fields
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 -- Seq Object number
4 A1 --- n_Seq [*] *: two galaxies in slit (1)
6- 7 I2 h RAh Right ascension (J2000.0)
9- 10 I2 min RAm Right ascension (J2000.0)
12- 16 F5.2 s RAs Right ascension (J2000.0)
18 A1 --- DE- Declination sign (J2000.0)
19- 20 I2 deg DEd Declination (J2000.0)
22- 23 I2 arcmin DEm Declination (J2000.0)
25- 28 F4.1 arcsec DEs Declination (J2000.0)
31- 38 A8 --- Name IDs of objects (2)
42- 46 F5.2 mag Umag ? U{AB} magnitude
48- 52 F5.2 mag Bmag ? B{AB} magnitude
54- 58 F5.2 mag Vmag ? V{AB} magnitude
60- 64 F5.2 mag Rmag ? R{AB} magnitude
65 A1 --- u_Rmag [?] Uncertainty flag on Rmag
67- 71 F5.2 mag Imag ? I{AB} magnitude
73- 77 F5.2 mag Jmag ? J{AB} magnitude
79- 83 F5.2 mag Hmag ? H{AB} magnitude
85- 89 F5.2 mag Kmag ? K{AB} magnitude
91- 96 A6 --- HST HST identification (3)
98- 99 I2 --- ISO ? ISO identification (4)
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Note (1): Coordinates given from the original sample galaxy.
Note (2): Identifications are:
BTCnnnnn: identifications correspond to the Big Throughput Camera
(BTC, Teplitz et al., 2001 , Cat. J/ApJ/548/127) catalogue
EISnnnn: identifications correspond to the ESO-EIS Deep catalogue
(da Costa et al., 1998, in prep., 9812105)
STAR: stands for star, no photometry is given.
Note (3): HST identifications are:
Number (nnnn) taken from WFPC2 main catalogue (Casertano et al., 2000
Cat. J/AJ/120/2747, [CDD2000] NNNN in Simbad),
Wn-nnn from WFPC2 flanking fields catalogue
(http://archive.stsci.edu/pub/hdf-south/version1),
ID number and field are reported.
Note (4): Identification numbers taken from ISO sources (Aussel et al., 2005,
in prep.)
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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- 2 I2 -- Seq Object number
3 A1 --- m_Seq [ab] Multiplicity index on Seq
5 A1 --- n_Seq [345] Note on Seq (1)
8- 12 F5.3 -- z ? Redshift (2)
13 A1 --- u_z Uncertainty flag on z
14 A1 --- n_z [s)] s for star,
) for literature redshifts (3)
16- 21 A6 -- line Description of emission/absorption line (4)
26- 31 F6.3 mW/m2 [OII] ? [OII] emission line flux
33- 37 F5.3 mW/m2 Hbeta ? Hβ emission line flux
39- 44 F6.3 mW/m2 [OIII] ? [OIII] emission line flux
46- 51 F6.3 solMass/yr SFR([OII]) ? [OII] star formation rates
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Note (1): Note on Seq is numbered as follows:
3 = two galaxies in slit
4 = This is a type I AGN (Franceschini et al. 2003A&A...403..501F 2003A&A...403..501F).
From the present observations we have detected CIV 1909 and MgII 2798 lines.
5 = The Hbeta line is very close to a night-sky line. The quoted flux
is a "de-blended" one. Hα has also been detected.
Note (2): Redshift measured from emission or absorption lines
Note (3): Literature redshifts from Rigopoulou et al., 2000ApJ...537L..85R 2000ApJ...537L..85R
or Franceschini et al., 2003A&A...403..501F 2003A&A...403..501F
Note (4): Description of spectrum use the following abbreviations:
em = emission lines detected
H+K = absorption features detected
cont = continuum detected but no lines
f.cont = faint continuum, no lines
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Acknowledgements: D. Rigopoulou, dar(at)astro.ox.ac.uk
References:
da Costa et al., 1998, 9812105 : ESO Imaging Survey. Hubble Deep
Field South: Optical-Infrared Observations, Data Reduction and Photometry.
(End) Patricia Vannier [CDS] 12-Jul-2005