THE BRIGHT END OF THE ULTRAVIOLET LUMINOSITY FUNCTION AT z ∼ 8: NEW CONSTRAINTS FROM CANDELS DATA IN GOODS-SOUTH

We present new z ~ 8 galaxy candidates from a search over ~95 arcmin super(2) of WFC3/IR data, tripling the previous search area for bright z ~ 8 galaxies. Our analysis uses newly acquired WFC3/IR imaging data from the CANDELS Multi-Cycle Treasury program over the GOODS-South field. These new candid...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2012-11, Vol.759 (2), p.1-15
Main Authors: OESCH, P. A, BOUWENS, R. J, ILLINGWORTH, G. D, GONZALEZ, V, TRENTI, M, VAN DOKKUM, P. G, FRANX, M, LABBE, I, CAROLLO, C. M, MAGEE, D
Format: Article
Language:English
Subjects:
ASTRONOMY
ASTROPHYSICS
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
CAMERAS
Criteria
Earth, ocean, space
Exact sciences and technology
Flux
GALACTIC EVOLUTION
GALAXIES
Imaging
Infrared radiation
LUMINOSITY
MASS
RED SHIFT
Searching
Star formation
STARS
ULTRAVIOLET RADIATION
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present new z ~ 8 galaxy candidates from a search over ~95 arcmin super(2) of WFC3/IR data, tripling the previous search area for bright z ~ 8 galaxies. Our analysis uses newly acquired WFC3/IR imaging data from the CANDELS Multi-Cycle Treasury program over the GOODS-South field. These new candidates are used to determine the bright end of the UV luminosity function (LF) of star-forming galaxies at z ~ 7.2-8.7, i.e., a cosmic age of 600 + or - 80Myr. To minimize contamination from lower redshift galaxies, we make full use of all optical ACS data and impose strict non-detection criteria based on an optical chi super(2) sub(opt) flux measurement. In the whole search area, we identify 16 candidate z ~ 8 galaxies, spanning a magnitude range H sub(160, )A B = 25.7-27.9 mag. A combination of wide-area data with additional ultra-deep imaging will be required to significantly reduce the uncertainties on these parameters in the future.
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/759/2/135