Galaxies at z = 6 - 9 from the WFC3/IR imaging of the HUDF

Understand

We present the results of a systematic search for galaxies in the redshift range z = 6 - 9, within the new, deep, near-infrared imaging of the Hubble Ultra Deep Field provided by the Wide Field Camera 3 (WFC3) on HST.

• We have performed full SED fitting to the optical+infrared photometry of all high-redshift galaxy candidates detected at greater than 5-sigma in at least one of the WFC3/IR broad-band filters.
• After rejection of contaminants, the result is a sample of 49 galaxies with primary redshift solutions z > 5.9.
• Our sample, selected without recourse to specific colour cuts, re-selects all but the faintest one of the 16 z-drops selected by Oesch et al.