Astrophys. J., 653, 1004-1026 (2006/December-3)
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. and PETTINI M.
Abstract (from CDS):
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 Ksband 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 of z∼2 galaxies. Deep Chandra and Spitzer data indicate that the sample includes galaxies with a wide range in Lbol(≃1010 to >1012 L☉) and 4 orders of magnitude in dust obscuration (Lbol/LUV). The sample includes galaxies with a large dynamic range in evolutionary state, from very young galaxies (ages ≃50 Myr) with small stellar masses (M*≃109 M☉) to evolved galaxies with stellar masses comparable to the most massive galaxies at these redshifts (M*>1011 M☉). Spitzer data indicate that the optical sample includes some fraction of the obscured AGN population at high redshifts: at least 3 of 11 AGNs in the z>1.4 sample are undetected in the deep X-ray data but exhibit power-law SEDs longward of ∼2 µm (rest frame) indicative of obscured AGNs. The results of our survey indicate that rest-frame UV selection and spectroscopy presently constitute the most timewise efficient method of culling large samples of high-redshift galaxies with a wide range in intrinsic properties, and the data presented here will add significantly to the multiwavelength legacy of GOODS.
Cosmology: Observations - Galaxies: Active - Galaxies: Evolution - Galaxies: High-Redshift - Galaxies: Starburst - Galaxies: Stellar Content
VizieR on-line data:
<Available at CDS (J/ApJ/653/1004): table2.dat table3.dat>
Table 2: [RSE2006] BXNNNN N=229 among (BX28-BX1860), [RSE2006] BMNNNN N=81 among (BM35-BM1413), [RSE2006] CNN N=18 among (Nos C2-C55), [RSE2006] DNN N=19 among (Nos D8-D55), [RSE2006] MDNN N=19 among (Nos MD8-MD55). Prevenir Patricia quand noms dans Simbad pour activer le lien vizir.
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