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Lensed galaxies in CANDELS

Research output: Contribution to Journal/MagazineJournal article

Unpublished
  • Asantha Cooray
  • Hai Fu
  • Jae Calanog
  • J. L. Wardlow
  • A. Chiu
  • Sam Kim
  • Joseph Smidt
  • V. Acquaviva
  • H. C. Ferguson
  • S. M. Faber
  • A. Galametz
  • N. A. Grogin
  • W. Hartley
  • D. Kocevski
  • A. Koekemoer
  • D. C. Koo
  • R. A. Lucas
  • L. Moustakas
  • J. A. Newman
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<mark>Journal publication date</mark>1/10/2011
<mark>Journal</mark>arxiv.org
Publication StatusUnpublished
<mark>Original language</mark>English

Abstract

We present results from a search for gravitationally lensed galaxies present in the Hubble Space Telescope (HST)/Wide Field Camera-3 (WFC3) images of the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey (CANDELS). We present one bona fide lens system in UDS and two compact lens candidates in the GOODS-S field. The lensing system in UDS involves two background galaxies, one at z=1.847 lensed to an arc and a counterimage, and the second at a photometric redshift of z=2.32^{+0.10}_{-0.06} lensed to a double image. We reconstruct the lensed sources in the source plane and find in each of the two cases the sources can be separated to a pair of galaxies. The sources responsible for the arc are compact with effective radii of 0.3 to 0.4 kpc in WFC3 J_{125}-band and a total stellar mass and a star-formation rate of 2.1_{-0.4}^{+2.4} times 10^7 M_sun and 2.3_{-1.7}^{+ 0.6} M_sun yr^{-1}, respectively.The abnormally high H_{160}-band flux of this source is likely due to OIII emission lines with a rest-frame equivalent width about 700 Angstroms for OIII 5007 Angstroms. The sources responsible for the double image have corresponding values of about 0.4 to 0.5 kpc, 1.4_{-0.8}^{+1.9} times 10^9 M_sun, and 8.7_{-7.0}^{+11.1} M_sun yr^{-1}. Once completed CANDELS is expected to contain about 15 lensing systems and will allow statistical studies on both lensing mass profiles and z ~ 2 lensed galaxies.