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The SINS Survey: SINFONI Integral Field Spectroscopy of z ~ 2 Star-forming Galaxies

Förster Schreiber, N. M. and Genzel, R. and Bouché, N. and Cresci, G. and Davies, R. and Buschkamp, P. and Shapiro, K. and Tacconi, L. J. and Hicks, E. K. S. and Genel, S. and Shapley, A. E. and Erb, D. K. and Steidel, C. C. and Lutz, D. and Eisenhauer, F. and Gillessen, S. and Sternberg, A. and Renzini, A. and Cimatti, A. and Daddi, E. and Kurk, J. and Lilly, S. and Kong, X. and Lehnert, M. D. and Nesvadba, N. and Verma, A. and McCracken, H. and Arimoto, N. and Mignoli, M. and Onodera, M. (2009) The SINS Survey: SINFONI Integral Field Spectroscopy of z ~ 2 Star-forming Galaxies. Astrophysical Journal, 706 (2). pp. 1364-1428. ISSN 0004-637X.

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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 Hα, 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 Hα sample," consisting of 62 rest-UV/optically selected sources at 1.3 < z < 2.6 for which we targeted primarily the Hα 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 Hα sample covers a reasonable representation of massive M_* ≳ 10^(10) M_☉ star-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 × 10^(10) M_☉, ≈70 M_☉ 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 Hα morphologies tend to be irregular and/or clumpy. About one-third of the SINS Hα 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 Hα 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.

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Steidel, C. C.0000-0002-4834-7260
Additional Information:© 2009 American Astronomical Society. Print publication: Issue 2 (2009 December 1); received 2009 March 10; accepted for publication 2009 October 19; published 2009 November 11. We thank the ESO staff, and in particular at Paranal Observatory, for their helpful and enthusiastic support during the many observing runs and several years over which SINFONI GTO were carried out. We also thank the SINFONI and PARSEC teams for their hard work on the instrument and the laser, which allowed our observational program to be carried out so successfully. We thank the referee for useful comments and suggestions that helped improve the quality and presentation of the paper. This paper and the SINS survey have benefited from many constructive, insightful, and enthusiastic discussions with many colleagues whom we are very grateful to, especially Marijn Franx for numerous inspiring discussions, as well as Andi Burkert, Thorsten Naab, Peter Johansson, Ortwin Gerhard, Avishai Dekel, Pieter van Dokkum, Guinevere Kauffmann, Simon White, Hans-Walter Rix, St´ephane Courteau, Martin Bureau, Claudia Maraston, among many others.We are grateful to Ian Smail, Scott Chapman, and Rob Ivison for providing the necessary information and imaging data of SMGs targeted as part of our SINS survey. N.M.F.S. acknowledges support by the Schwerpunkt Programme SPP1177 of the Deutsche Forschungsgemeinschaft and by the Minerva Program of the Max-Planck-Gesellschaft. N.A. is supported by a Grant-in-Aid for Science Research (19549245) by the Japanese Ministry of Education, Culture, Sports, Science and Technology.
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Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Ministry of Education, Culture, Sports, Science and Technology (MEXT)19549245
Subject Keywords:galaxies: evolution; galaxies: high-redshift; galaxies: kinematics and dynamics; infrared: galaxies
Record Number:CaltechAUTHORS:20091209-112844140
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Official Citation:The SINS Survey: SINFONI Integral Field Spectroscopy of z ~ 2 Star-forming Galaxies N. M. Förster Schreiber, R. Genzel, N. Bouché, G. Cresci, R. Davies, P. Buschkamp, K. Shapiro, L. J. Tacconi, E. K. S. Hicks, S. Genel, A. E. Shapley, D. K. Erb, C. C. Steidel, D. Lutz, F. Eisenhauer, S. Gillessen, A. Sternberg, A. Renzini, A. Cimatti, E. Daddi, J. Kurk, S. Lilly, X. Kong, M. D. Lehnert, N. Nesvadba, A. Verma, H. McCracken, N. Arimoto, M. Mignoli, and M. Onodera 2009 ApJ 706 1364-1428 doi: 10.1088/0004-637X/706/2/1364
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16925
Deposited By: Jason Perez
Deposited On:09 Dec 2009 23:59
Last Modified:11 Dec 2016 21:44

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