CLASH: A CENSUS OF MAGNIFIED STAR-FORMING GALAXIES AT z ∼ 6-8

We utilize 16 band Hubble Space Telescope (HST) observations of 18 lensing clusters obtained as part of the Cluster Lensing And Supernova survey with Hubble (CLASH) Multi-Cycle Treasury program to search for z ~ 6-8 galaxies. This large sample, representing nearly an order of magnitude increase in t...

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Bibliographic Details
Published in:The Astrophysical journal 2014-09, Vol.792 (1), p.1-19
Main Authors: Bradley, L D, Zitrin, A, Coe, D, Bouwens, R, Postman, M, Balestra, I, Grillo, C, MONNA, A, Rosati, P, Seitz, S
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
CLUSTER MODEL
Clusters
COMPARATIVE EVALUATIONS
Counting
DENSITY
EFFICIENCY
GALAXIES
GRAVITATIONAL LENSES
Hubble Space Telescope
LUMINOSITY
Photometry
RED SHIFT
Searching
SPACE
STAR CLUSTERS
STAR EVOLUTION
Star formation
STARS
Statistical methods
STATISTICS
TELESCOPES
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Summary:We utilize 16 band Hubble Space Telescope (HST) observations of 18 lensing clusters obtained as part of the Cluster Lensing And Supernova survey with Hubble (CLASH) Multi-Cycle Treasury program to search for z ~ 6-8 galaxies. This large sample, representing nearly an order of magnitude increase in the number of magnified star-forming galaxies at z ~ 6-8 presented to date, is unique in that we have observations in four WFC3/UVIS UV, seven ACS/WFC optical, and all five WFC3/IR broadband filters, which enable very accurate photometric redshift selections. We compare our observed number counts with expectations based on convolving "blank" field UV luminosity functions through our cluster lens models and find rough agreement down to ~27 mag, where we begin to suffer significant incompleteness. Our number counts also are in general agreement with the lensed expectations from the cluster models, especially at z ~ 6, where we have the best statistics.
ISSN:1538-4357
0004-637X
1538-4357
DOI:10.1088/0004-637X/792/1/76