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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
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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 99 94 Identifications and photometry table3.dat 51 100 Spectroscopic redshifts and line detections
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) : WFPC2 flanking fields Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
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)
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., astroph/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 (, ID number and field are reported. Note (4): Identification numbers taken from ISO sources (Aussel et al., 2005, in prep.)
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
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
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). 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 or Franceschini et al., 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
Acknowledgements: D. Rigopoulou, dar(at) References: da Costa et al., 1998, astroph/9812105 : ESO Imaging Survey. Hubble Deep Field South: Optical-Infrared Observations, Data Reduction and Photometry.
(End) Patricia Vannier [CDS] 12-Jul-2005
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