Bright Lyα emitters at z ~ 9: Constraints on the LF from HizELS
New results are presented, as part of the Hi-z Emission Line Survey (HizELS), from the largest area survey to date (1.4 deg 2) for Lyα emitters (LAEs) at z ~ 9. The survey, which is primarily targeting Hα emitters at z < 3, uses the Wide Field CAMera on the United King...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2009
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| _version_ | 1797083135489343488 |
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| author | Sobral, D Best, P Geach, J Smail, I Kurk, J Cirasuolo, M Casali, M Ivison, R Coppin, K Dalton, G |
| author_facet | Sobral, D Best, P Geach, J Smail, I Kurk, J Cirasuolo, M Casali, M Ivison, R Coppin, K Dalton, G |
| author_sort | Sobral, D |
| collection | OXFORD |
| description | New results are presented, as part of the Hi-z Emission Line Survey (HizELS), from the largest area survey to date (1.4 deg 2) for Lyα emitters (LAEs) at z ~ 9. The survey, which is primarily targeting Hα emitters at z < 3, uses the Wide Field CAMera on the United Kingdom Infrared Telescope and a custom narrow-band filter in the J band and reaches a Lyα luminosity limit of ~10 43.8ergs -1 over a co-moving volume of 1.12 × 10 6 Mpc 3 at z = 8.96 ± 0.06. Only two candidates were found out of 1517 line emitters and those were rejected as LAEs after follow-up observations. The limit on the space density of bright LAEs is improved by three orders of magnitude, consistent with suppression of the bright end of the Lyα luminosity function beyond z ~ 6. Combined with upper limits from smaller but deeper surveys, this rules out some of the most extreme models for high-redshift LAEs. The potential contamination of future narrow-band Lyα 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. © 2009 The Authors. Journal compilation © 2009 RAS. |
| first_indexed | 2024-03-07T01:37:35Z |
| format | Journal article |
| id | oxford-uuid:95bb74b9-8c3d-4bb1-ac26-4689986e650d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:37:35Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:95bb74b9-8c3d-4bb1-ac26-4689986e650d2022-03-26T23:48:09ZBright Lyα emitters at z ~ 9: Constraints on the LF from HizELSJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:95bb74b9-8c3d-4bb1-ac26-4689986e650dEnglishSymplectic Elements at Oxford2009Sobral, DBest, PGeach, JSmail, IKurk, JCirasuolo, MCasali, MIvison, RCoppin, KDalton, GNew results are presented, as part of the Hi-z Emission Line Survey (HizELS), from the largest area survey to date (1.4 deg 2) for Lyα emitters (LAEs) at z ~ 9. The survey, which is primarily targeting Hα emitters at z < 3, uses the Wide Field CAMera on the United Kingdom Infrared Telescope and a custom narrow-band filter in the J band and reaches a Lyα luminosity limit of ~10 43.8ergs -1 over a co-moving volume of 1.12 × 10 6 Mpc 3 at z = 8.96 ± 0.06. Only two candidates were found out of 1517 line emitters and those were rejected as LAEs after follow-up observations. The limit on the space density of bright LAEs is improved by three orders of magnitude, consistent with suppression of the bright end of the Lyα luminosity function beyond z ~ 6. Combined with upper limits from smaller but deeper surveys, this rules out some of the most extreme models for high-redshift LAEs. The potential contamination of future narrow-band Lyα 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. © 2009 The Authors. Journal compilation © 2009 RAS. |
| spellingShingle | Sobral, D Best, P Geach, J Smail, I Kurk, J Cirasuolo, M Casali, M Ivison, R Coppin, K Dalton, G Bright Lyα emitters at z ~ 9: Constraints on the LF from HizELS |
| title | Bright Lyα emitters at z ~ 9: Constraints on the LF from HizELS |
| title_full | Bright Lyα emitters at z ~ 9: Constraints on the LF from HizELS |
| title_fullStr | Bright Lyα emitters at z ~ 9: Constraints on the LF from HizELS |
| title_full_unstemmed | Bright Lyα emitters at z ~ 9: Constraints on the LF from HizELS |
| title_short | Bright Lyα emitters at z ~ 9: Constraints on the LF from HizELS |
| title_sort | bright lyα emitters at z 9 constraints on the lf from hizels |
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