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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 448127.0, MPI für Astronomie / Publikationen_mpia
The SINS Survey: SINFONI integral field spectroscopy of z ~ 2 star-forming galaxies
Authors:Förster Schreiber, N. M.; Genzel, R.; Bouché, N.; Cresci, G.; Davies, R.; Buschkamp, P.; Shapiro, K.; Tacconi, L. J.; Hicks, E. K. S.; Genel, S.; Shapley, A. E.; Erb, D. K.; Steidel, C. C.; Lutz, D.; Eisenhauer, F.; Gillessen, S.; Sternberg, A.; Renzini, A.; Cimatti, A.; Daddi, E.; Kurk, J.; Lilly, S.; Kong, X.; Lehnert, M. D.; Nesvadba, N.; Verma, A.; Mc Cracken, H.; Arimoto, N.; Mignoli, M.; Onodera, M.
Date of Publication (YYYY-MM-DD):2009
Title of Journal:The Astrophysical Journal
Journal Abbrev.:ApJ
Start Page:1364
End Page:1428
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We present the Spectroscopic Imaging survey in the near-infrared (near-IR) with SINFONI (SINS) of high-redshift galaxies. With 80 objects observed and 63 detected in at least one rest-frame optical nebular emission line, mainly Halpha, SINS represents the largest survey of spatially resolved gas kinematics, morphologies, and physical properties of star-forming galaxies at z ~ 1-3. We describe the selection of the targets, the observations, and the data reduction. We then focus on the "SINS Halpha sample," consisting of 62 rest-UV/optically selected sources at 1.3 < z < 2.6 for which we targeted primarily the Halpha and [N II] emission lines. Only ≈30% of this sample had previous near-IR spectroscopic observations. The galaxies were drawn from various imaging surveys with different photometric criteria; as a whole, the SINS Halpha sample covers a reasonable representation of massive M sstarf gsim 1010 M sunstar-forming galaxies at z ≈ 1.5-2.5, with some bias toward bluer systems compared to pure K-selected samples due to the requirement of secure optical redshift. The sample spans 2 orders of magnitude in stellar mass and in absolute and specific star formation rates, with median values ≈3 × 1010 M sun, ≈70 M sun yr--1, and ≈3 Gyr--1. The ionized gas distribution and kinematics are spatially resolved on scales ranging from ≈1.5 kpc for adaptive optics assisted observations to typically ≈4-5 kpc for seeing-limited data. The Halpha morphologies tend to be irregular and/or clumpy. About one-third of the SINS Halpha sample galaxies are rotation-dominated yet turbulent disks, another one-third comprises compact and velocity dispersion-dominated objects, and the remaining galaxies are clear interacting/merging systems; the fraction of rotation-dominated systems increases among the more massive part of the sample. The Halpha luminosities and equivalent widths suggest on average roughly twice higher dust attenuation toward the H II regions relative to the bulk of the stars, and comparable current and past-averaged star formation rates. Based on observations obtained at the Very Large Telescope (VLT) of the European Southern Observatory, Paranal, Chile (ESO Programme IDs 070.A-0229, 070.B-0545, 073.B-9018, 074.A-9011, 075.A-0466, 076.A-0527, 077.A-0576, 078.A-0055, 078.A-0600, 079.A-0341, 080.A-0330, 080.A-0635, and 080.A-0339).
Free Keywords:galaxies: evolution; galaxies: high-redshift; galaxies: kinematics and dynamics; infrared: galaxies
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2009ApJ...706.1364F [ID No:1]
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