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The DEEP2 Redshift Survey: Lyman Alpha Emitters in the Spectroscopic Database
- Publication Year :
- 2008
- Publisher :
- arXiv, 2008.
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Abstract
- We present the first results of a search for Lyman-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 ~20% of the available DEEP2 spectroscopic data and have found nine high-quality LAEs with clearly asymmetric line profiles and an additional ten 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 with respect to the primary Lyman-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.<br />Comment: Accepted for publication in ApJ
- Subjects :
- Astrophysics (astro-ph)
FOS: Physical sciences
Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....dee150d84d9f4b55977789165b7dbe87
- Full Text :
- https://doi.org/10.48550/arxiv.0807.1890