1211.6804 (Richard S Ellis et al.)

The Abundance of Star-Forming Galaxies in the Redshift Range 8.5 to 12: New Results from the 2012 Hubble Ultra Deep Field Campaign    [PDF]

Richard S Ellis, Ross J McLure, James S Dunlop, Brant E Robertson, Yoshiaki Ono, Matthew A Schenker, Anton Koekemoer, Rebecca A A Bowler, Masami Ouchi, Alexander B Rogers, Emma Curtis-Lake, Evan Schneider, Stephane Charlot, Daniel P Stark, Steven R Furlanetto, Michele Cirasuolo

We present the results of the deepest search to date for star-forming galaxies beyond a redshift z~8.5 utilizing a new sequence of near-infrared Wide Field Camera 3 images of the Hubble Ultra Deep Field. This `UDF12' campaign completed in September 2012 doubles the earlier exposures with WFC3/IR in this field and quadruples the exposure in the key F105W filter used to locate such distant galaxies. Combined with additional imaging in the F140W filter, the fidelity of high redshift candidates is greatly improved. Using spectral energy distribution fitting techniques on objects selected from a deep multi-band near-infrared stack we find 7 promising z>8.5 candidates. As none of the previously claimed UDF candidates with 8.510 galaxies with JWST.

View original: http://arxiv.org/abs/1211.6804