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The DEEP2 Redshift Survey: Lyα Emitters in the Spectroscopic Database

Sawicki, Marcin and Lemaux, Brian C. and Guhathakurta, Puragra and Kirby, Evan N. and Konidaris, Nicholas P. and Martin, Crystal L. and Cooper, Michael C. and Koo, David C. and Newman, Jeffrey A. and Weiner, Benjamin J. (2008) The DEEP2 Redshift Survey: Lyα Emitters in the Spectroscopic Database. Astrophysical Journal, 687 (2). pp. 884-898. ISSN 0004-637X. doi:10.1086/591779.

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We present the first results of a search for Lyα emitters (LAEs) in the DEEP2 spectroscopic database that uses a search technique that is different from but complementary to traditional narrowband imaging surveys. We have visually inspected ~20% of the available DEEP2 spectroscopic data and have found nine high-quality LAEs with clearly asymmetric line profiles and an additional 10 objects of lower quality, some of which may also be LAEs. Our survey is most sensitive to LAEs at z = 4.4–4.9 and that is indeed where all but one of our high-quality objects are found. We find the number density of our spectroscopically discovered LAEs to be consistent with those found in narrowband imaging searches. The combined, averaged spectrum of our nine high-quality objects is well fit by a two-component model, with a second, lower amplitude component redshifted by ~420 km s^(−1) with respect to the primary Lyα line, consistent with large-scale outflows from these objects. We conclude by discussing the advantages and future prospects of blank-sky spectroscopic surveys for high-z LAEs.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Sawicki, Marcin0000-0002-7712-7857
Lemaux, Brian C.0000-0002-1428-7036
Guhathakurta, Puragra0000-0001-8867-4234
Kirby, Evan N.0000-0001-6196-5162
Konidaris, Nicholas P.0000-0003-1905-2815
Cooper, Michael C.0000-0003-1371-6019
Koo, David C.0000-0003-3385-6799
Newman, Jeffrey A.0000-0001-8684-2222
Alternate Title:The DEEP2 Redshift Survey: Lyman Alpha Emitters in the Spectroscopic Database
Additional Information:© 2008. The American Astronomical Society. Received 2007 October 12; accepted 2008 July 11. Based on data obtained at theW.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and NASA, and was made possible by the generous financial support of the W. M. Keck Foundation. We wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community; we are most fortunate to have the opportunity to conduct observations from this mountain. We thank Alison Coil and Sandy Faber for useful discussions, and all the members of the DEEP2 team for their contributions to making possible the data used here. We thank Jerzy Sawicki for a careful reading of the manuscript and many useful comments. Parts of the analysis presented here made use of the Perl Data Language (PDL) that has been developed by K. Glazebrook, J. Brinchmann, J. Cerney, C. DeForest, D. Hunt, T. Jenness, T. Luka, R. Schwebel, and C. Soeller, which can be obtained from PDL provides a high-level numerical functionality for the Perl scripting language (Glazebrook & Economou, 1997). This work was supported in part by a Discovery Grant from the Natural Sciences and Engineering Research Council of Canada, NSF grants AST 00-71198 and AST 05-07483 funding from the NASA/STScI and the Canadian Space Agency, and by the David and Lucile Packard Foundation.
Funding AgencyGrant Number
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
NSFAST 00-71198
NSFAST 05-07483
Canadian Space Agency (CSA)UNSPECIFIED
David and Lucile Packard FoundationUNSPECIFIED
W. M. Keck FoundationUNSPECIFIED
Subject Keywords:galaxies: evolution; galaxies: formation; galaxies: high-redshift; techniques: spectroscopic
Issue or Number:2
Record Number:CaltechAUTHORS:20190510-120908504
Persistent URL:
Official Citation:Marcin Sawicki et al 2008 ApJ 687 884
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95409
Deposited By: George Porter
Deposited On:10 May 2019 21:56
Last Modified:16 Nov 2021 17:12

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