THE REDSHIFT DISTRIBUTION OF DUSTY STAR-FORMING GALAXIES FROM THE SPT SURVEY
Author
Strandet, M. L.
Weiss, A.
Vieira, J. D.

de Breuck, C.

Aguirre, J. E.

Aravena, Manuel

Ashby, M. L. N.

Béthermin, M.
Bradford, C. M.
Carlstrom, J. E.
Chapman, S. C.
Crawford, T. M.
Everett, W.
Fassnacht, C. D.
Furstenau, R. M.
Gonzalez, Anthony H.

Greve, T. R.

Gullberg, B.
Hezaveh, Y.

Kamenetzky, J. R.

Litke, K.
Ma, J.

Malkan, M.
Marrone, Daniel P.

Menten, Karl M.

Murphy, Eric J.

Nadolski, A.
Rotermund, K. M.
Spilker, J. S.
Stark, A. A.
Welikala, N.
Affiliation
Univ Arizona, Steward ObservIssue Date
2016-05-10Keywords
cosmology: observationsearly universe
galaxies: evolution
galaxies: high-redshift
ISM: molecules
Metadata
Show full item recordPublisher
IOP PUBLISHING LTDCitation
THE REDSHIFT DISTRIBUTION OF DUSTY STAR-FORMING GALAXIES FROM THE SPT SURVEY 2016, 822 (2):80 The Astrophysical JournalJournal
The Astrophysical JournalRights
© 2016. The American Astronomical Society. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
We use the Atacama Large Millimeter/submillimeter Array (ALMA) in Cycle 1 to determine spectroscopic redshifts of high-redshift dusty star-forming galaxies (DSFGs) selected by their 1.4 mm continuum emission in the South Pole Telescope (SPT) survey. We present ALMA 3 mm spectral scans between 84 and 114 GHz for 15 galaxies and targeted ALMA 1 mm observations for an additional eight sources. Our observations yield 30 new line detections from CO, [CI], [NII], H2O and NH3. We further present Atacama Pathfinder Experiment [CII] and CO mid-J observations for seven sources for which only a single line was detected in spectral-scan data from ALMA Cycle 0 or Cycle 1. We combine the new observations with previously published and new millimeter/submillimeter line and photometric data of the SPT-selected DSFGs to study their redshift distribution. The combined data yield 39 spectroscopic redshifts from molecular lines, a success rate of >85%. Our sample represents the largest data set of its kind today and has the highest spectroscopic completeness among all redshift surveys of high-z DSFGs. The median of the redshift distribution is z = 3.9 +/- 0.4, and the highest-redshift source in our sample is at z = 5.8. We discuss how the selection of our sources affects the redshift distribution, focusing on source brightness, selection wavelength, and strong gravitational lensing. We correct for the effect of gravitational lensing and find the redshift distribution for 1.4 mm selected sources with a median redshift of z = 3.1 +/- 0.3. Comparing to redshift distributions selected at shorter wavelengths from the literature, we show that selection wavelength affects the shape of the redshift distribution.ISSN
1538-4357Version
Final published versionSponsors
International Max Planck Research School (IMPRS) for Astronomy and Astrophysics at the Universities of Bonn and Cologne; FONDECYT [1140099]; U.S. National Science Foundation [AST-1312950]; Herschel [OT1_jvieira_4, DDT_mstrande_1]; Commonwealth of Australia; VLT/X-Shooter under the ESO project [E-092.A-0503(A)]; National Science Foundation [PLR-1248097]; Kavli Foundation; Gordon and Betty Moore Foundation [GBMF 947]; [E-086. A-0793A-2010]; [M-085.F-0008-2010]; [M-087.F-0015-2011]; [M-091.F-0031-2013]; [E-094.A-0712A-2014]; [M-095.F-0028-2015]; [E-096.A-0939A-2015]; [PHY-1125897]Additional Links
http://stacks.iop.org/0004-637X/822/i=2/a=80?key=crossref.72005beeb79ba19839c1b097a8cc6808ae974a485f413a2113503eed53cd6c53
10.3847/0004-637X/822/2/80