| | |
| | |
Stat |
Members: 3645 Articles: 2'501'711 Articles rated: 2609
20 April 2024 |
|
| | | |
|
Article overview
| |
|
The UV Luminosity Function of star-forming galaxies via dropout selection at redshifts z ~ 7 and 8 from the 2012 Ultra Deep Field campaign | Matthew A. Schenker
; Brant E. Robertson
; Richard S. Ellis
; Yoshiaki Ono
; Ross J. McLure
; James S. Dunlop
; Anton Koekemoer
; Rebecca A. A. Bowler
; Masami Ouchi
; Emma Curtis-Lake
; Alexander B. Rogers
; Evan Schneider
; Stephane Charlot
; Daniel P. Stark
; Steven R. Furlanetto
; Michele Cirasuolo
; | Date: |
20 Dec 2012 | Abstract: | We present a catalog of high redshift star-forming galaxies selected to lie
within the redshift range z ~ 7-8 using the Ultra Deep Field 2012 (UDF12), the
deepest near-infrared (near-IR) exposures yet taken with the Hubble Space
Telescope. As a result of the increased near-infrared exposure time compared to
previous HST imaging in this field, we probe 0.65 (0.25) mag fainter in
absolute UV magnitude, at z ~ 7 (8), which increases confidence in a
measurement of the faint end slope of the galaxy luminosity function. Through a
0.7 mag deeper limit in the key F105W filter that encompasses or lies just
longward of the Lyman break, we also achieve a much-refined color-color
selection that balances high redshift completeness and a low expected
contamination fraction. We improve the number of drop-out selected UDF sources
to 47 at z ~ 7 and 27 at z ~ 8. Incorporating brighter archival and
ground-based samples, we measure the z ~ 7 UV luminosity function to an
absolute magnitude limit of M_UV = -17 and find a faint end Schechter slope of
alpha = -1.87+/- 0.18. Using a similar color-color selection at z ~ 8 that
takes account of our newly-added imaging in the F140W filter, and incorporating
archival data from the HIPPIES and BoRG campaigns, we provide a robust estimate
of the faint end slope at z ~ 8, alpha = -1.94 +/- 0.23. We briefly discuss
our results in the context of earlier work and that derived using the same
UDF12 data but with an independent photometric redshift technique (McLure et al
2012). | Source: | arXiv, 1212.4819 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |