A PANCHROMATIC CATALOG OF EARLY-TYPE GALAXIES AT INTERMEDIATE REDSHIFT IN THE HUBBLE SPACE TELESCOPE WIDE FIELD CAMERA 3 EARLY RELEASE SCIENCE FIELD
- School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287-1404 (United States)
- Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH (United Kingdom)
- Department of Astronomy, University of Virginia, P.O. Box 3818, Charlottesville, VA 22903 (United States)
- Observatories of the Carnegie Institute of Washington, Pasadena, CA 91101 (United States)
- Space Telescope Science Institute, Baltimore, MD 21218 (United States)
- Center for Cosmology and Astroparticle Physics, Ohio State University, Columbus, OH 43210 (United States)
- NASA-Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
- Department of Astronomy, University of Washington, Seattle, WA 98195-1580 (United States)
- Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States)
- School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA (United Kingdom)
- Research School of Physics and Astronomy, The Australian National University, ACT 2611 (Australia)
- Astronomy Department, King Abdulaziz University, P.O. Box 80203, Jeddah (Saudi Arabia)
- Institute for Astronomy, University of Hawaii, Honolulu, HI 96822 (United States)
In the first of a series of forthcoming publications, we present a panchromatic catalog of 102 visually selected early-type galaxies (ETGs) from observations in the Early Release Science (ERS) program with the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) of the Great Observatories Origins Deep Survey-South (GOODS-S) field. Our ETGs span a large redshift range, 0.35 {approx}< z {approx}< 1.5, with each redshift spectroscopically confirmed by previous published surveys of the ERS field. We combine our measured WFC3 ERS and Advanced Camera for Surveys (ACS) GOODS-S photometry to gain continuous sensitivity from the rest-frame far-UV to near-IR emission for each ETG. The superior spatial resolution of the HST over this panchromatic baseline allows us to classify the ETGs by their small-scale internal structures, as well as their local environment. By fitting stellar population spectral templates to the broadband photometry of the ETGs, we determine that the average masses of the ETGs are comparable to the characteristic stellar mass of massive galaxies, 10{sup 11} < M{sub *}[M{sub Sun }]<10{sup 12}. By transforming the observed photometry into the Galaxy Evolution Explorer FUV and NUV, Johnson V, and Sloan Digital Sky Survey g' and r' bandpasses we identify a noteworthy diversity in the rest-frame UV-optical colors and find the mean rest-frame (FUV-V) = 3.5 and (NUV-V) = 3.3, with 1{sigma} standard deviations {approx_equal}1.0. The blue rest-frame UV-optical colors observed for most of the ETGs are evidence for star formation during the preceding gigayear, but no systems exhibit UV-optical photometry consistent with major recent ({approx}<50 Myr) starbursts. Future publications which address the diversity of stellar populations likely to be present in these ETGs, and the potential mechanisms by which recent star formation episodes are activated, are discussed.
- OSTI ID:
- 22048009
- Journal Information:
- Astrophysical Journal, Supplement Series, Vol. 199, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0067-0049
- Country of Publication:
- United States
- Language:
- English
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