The HiZELS/UKIRT Large Survey for Bright Ly alpha Emitters at z similar to 9

David Sobral, Philip Best, Jim Geach, Ian Smail, Jaron Kurk, Michele Cirasuolo, Mark Casali, Rob Ivison, Kristen Coppin, Gavin Dalton

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

We present the largest area survey to date (1.4 deg(2)) for Ly alpha emitters (LAEs) at z similar to 9, as part of the Hi-z Emission Line Survey (HiZELS). The survey, which primarily targets H' emitters at z <3, uses the Wide Field Camera on the United Kingdom Infrared Telescope and a custom narrowband filter in the J band to reach a Ly alpha luminosity limit of similar to 10(43.8) erg s(-1) over a co-moving volume of 1.12 x 10(6) Mpc(3) at z = 8.96 +/- 0.06. Two candidates were found out of 1,517 line emitters, but those were rejected as LAEs after follow-up observations. This improves the limit on the space density of bright Ly' emitters by three orders of magnitude and is consistent with suppression of the bright end of the Ly' luminosity function beyond z similar to 6. Combined with upper limits from smaller but deeper surveys, this rules out some of the most extreme models for high-redshift Ly alpha emitters. The potential contamination of narrowband Ly' surveys at z > 7 by Galactic brown dwarf stars is also examined, leading to the conclusion that such contamination may well be significant for searches at 7.7 <z <8.0, 9.1<z<9.5 and 11.7<z<12.2.

Original languageEnglish
Title of host publicationTHIRTY YEARS OF ASTRONOMICAL DISCOVERY WITH UKIRT: THE SCIENTIFIC ACHIEVEMENT OF THE UNITED KINGDOM INFRARED TELESCOPE
EditorsA Adamson, J Davies, Robson
Place of PublicationNEW YORK
PublisherSpringer-Verlag
Pages251-258
Number of pages8
ISBN (Print)978-94-007-7431-5
DOIs
Publication statusPublished - 2013

Publication series

NameAstrophysics and Space Science Proceedings
PublisherSPRINGER
Volume37
ISSN (Print)1570-6591

Keywords

  • ULTRA-DEEP-FIELD
  • STAR-FORMING GALAXIES
  • HIGH-REDSHIFT SURVEY
  • J-BAND SEARCH
  • EMITTING GALAXIES
  • H-ALPHA
  • LUMINOSITY FUNCTIONS
  • REIONIZATION EPOCH
  • HUBBLE
  • EVOLUTION

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