Journal article


PA Oesch, RJ Bouwens, GD Illingworth, CM Carollo, M Franx, I Labbe, D Magee, M Stiavelli, M Trenti, PG van Dokkum

The Astrophysical Journal Letters | IOP PUBLISHING LTD | Published : 2010


We present a sample of 16 robust z∼7 z -drop galaxies detected by the newly installed Wide Field Camera 3 (WFC3)/IR on the Hubble Space Telescope. Our analysis is based on the first epoch data of the HUDF09 program covering the Hubble Ultra Deep Field with 60 orbits of Y , J , and H observations. These remarkable data cover 4.7 arcmin and are the deepest near infrared images ever taken, reaching to 29 mag AB (5σ). The 16 z 6.5-7.5 galaxies have been identified based on the Lyman Break technique utilizing (z - Y ) versus (Y - J ) colors. They have magnitudes J =26.0-29.0 (AB), an average apparent half-light radius of 0.16 arcsec (≲1 kpc), and show very blue colors (some even β ≲ ..

View full abstract

University of Melbourne Researchers


Awarded by NASA

Funding Acknowledgements

We especially thank all those at NASA, STScI, and throughout the community who have worked so diligently to make Hubble the remarkable observatory that it is today. The servicing missions, like the recent SM4, have rejuvenated HST and made it an extraordinarily productive scientific facility time and time again, and we greatly appreciate the support of policymakers, and all those in the flight and servicing programs who contributed to the repeated successes of the HST servicing missions. P.O. acknowledges support from the Swiss National Foundation (SNF). This work has been supported by NASA grant NAG5-7697 and NASA grant HST-GO-11563.01. This research has benefitted from the SpeX Prism Spectral Libraries, maintained by Adam Burgasser at