HST/WFC3 Early Release Science In The GOODS-South Field: UV-dropout Galaxies At Z=2-3

Details HST/WFC3 Early Release Science In The GOODS-South Field: UV-dropout Galaxies At Z=2-3 HST/WFC3 Early Release Science In The GOODS-South Field: UV-dropout Galaxies At Z=2-3

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21546337h&link_type=abstract

American Astronomical Society, AAS Meeting #215, #463.37; Bulletin of the American Astronomical Society, Vol. 36, p.1116

Astronomy and Astrophysics

Astronomy

Scientific paper

We combine new high sensitivity of Ultraviolet (UV) imaging from the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) with existing deep HST/ACS optical (F435W, F606W, F775W and F850LP) images from the GOODS program to identify UV-dropouts, which are galaxy candidates at z=2-3. These new HST/WFC3 observations were taken over 50 sq. arcminutes in the GOODS-South field as a part of the Early Release Science program. The uniqueness of these new UV data is that they are observed in 3 filters (F225W, F275W and F336W), which allows us to identify two different sets of UV-dropout samples. We apply (F275W-F336W) vs. (F336W-F435W) color selection criteria to identify F275W-dropout (z=2) galaxy candidates and (F336W-F435W) vs. (F435W-F606W) criteria to identify F336W-dropout (z=3) galaxy candidates. Multi-wavelength imaging and extensive spectroscopic follow-up observations in this field enable us to carefully access validity of our UV-dropout candidates. We estimate number counts and rest-frame UV Luminosity functions for galaxies at z=2-3, and these results are compared to other surveys at similar redshifts. This project is based on Early Release Science observations made by the WFC3 Scientific Oversight Committee. We are grateful to the Director of the Space Telescope Science Institute for awarding Director's Discretionary time for this program. Support for program #11359 was provided by NASA through a grant from the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.

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