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  • The DEEP2 Redshift Survey: ...
    Sawicki, Marcin; Lemaux, Brian C; Guhathakurta, Puragra; Kirby, Evan N; Konidaris, Nicholas P; Martin, Crystal L; Cooper, Michael C; Koo, David C; Newman, Jeffrey A; Weiner, Benjamin J

    The Astrophysical journal, 11/2008, Letnik: 687, Številka: 2
    Journal Article

    We present the first results of a search for Ly alpha 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 image20% 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 image 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 image420 km s super(-1) with respect to the primary Ly alpha 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.