The Galaxy Luminosity Function at Redshifts 7 <z <9 from the Hubble Ultradeep Field 2012

Matthew Schenker, R. McLure, Y. Ono, R. S. Ellis, J. Dunlop, A. M. Koekemoer, B. E. Robertson, [No Value] UDF12 Team

Research output: Contribution to conferenceAbstractpeer-review

Abstract / Description of output

The UV-selected galaxy luminosity function at z > 6 provides a crucial observational constraint on the earliest phases of galaxy evolution and the likely role galaxies play in cosmic reionization. Within this context, we present new results on the galaxy luminosity function at redshifts 7 <z <9 arising from the unprecedented deep near-IR imaging data provided by the Hubble Space Telescope (HST) Ultra Deep Field 2012 (UDF12) program undertaken with the near-infrared arm of the Wide Field Camera 3 (WFC3/IR). Compared to previous data in the UDF, the new UDF12 program quadruples the integration time in the vital Y-band filter (F105W), reaching a 5-sigma detection limit of 30.0 AB, and provides the first ultra-deep imaging (5-sigma limit=29.8 AB) in the previously unused J-band/F140W filter. Using a combination of traditional drop-out selection and photometric redshift techniques we have assembled a well defined sample of over 200 galaxies at z>6.5, drawn from UDF12 and wider field HST imaging sampling a total area of 300 square arcmin. Our combined analyses provide the most accurate measures to data of the faint end of the luminosity function at z=7 and z=8, and the first census of the population at z=9. High redshift galaxy samples derived from the UDF12 program will provide a premier resource for studying high-redshift galaxy evolution in the era prior to the launch of the James Webb Space Telescope.
Original languageEnglish
Publication statusPublished - 1 Jan 2013
EventAAS, 221st Meeting of the American Astronomical Society - California, Long Beach, United Kingdom
Duration: 6 Jan 201310 Jan 2013


ConferenceAAS, 221st Meeting of the American Astronomical Society
Country/TerritoryUnited Kingdom
CityLong Beach


Dive into the research topics of 'The Galaxy Luminosity Function at Redshifts 7 <z <9 from the Hubble Ultradeep Field 2012'. Together they form a unique fingerprint.

Cite this