A Possible Gravitational Lens in the Hubble Deep Field South
Abstract
We model an apparent gravitational lens system HDFS 2232509-603243 in the Hubble Deep Field South. The system consists of a blue V = 25 mag arc separated by 0."9 from a red V = 22 mag elliptical galaxy. A mass distribution that follows the observed light distribution with a constant mass-to-light ratio can fit the arc component positions if external shear is added. A good fit is also obtained with simple parameterized models, and all the models predict a fourth image that is fainter than the detection limit. The inferred mass-to-light ratio is ~15 in solar units if the lens is at z = 0.6. The lens models predict a velocity dispersion of ~280 km s^(-1) that could be confirmed with spectroscopy.
Additional Information
© 1999 The American Astronomical Society. Received 1998 December 15; accepted 1999 January 13; published 1999 February 11. It is a pleasure to thank Bob Williams and the entire HDFS team for taking, reducing, and making public the beautiful images of the HDF-S. Scott Burles, Wayne Hu, and Inger Joergensen provided very useful help in short order. We thank the referee, Emilio Falco, for useful comments. This research is based on observations made with the NASA/ESA Hubble Space Telescope, which is operated by AURA, Inc., under NASA contract NAS5-26555. R. Barkana acknowledges support from Institute Funds. R. Blandford acknowledges the Alfred P. Sloan Foundation. D. W. Hogg acknowledges a Hubble Fellowship grant HF-01093.01-97A from STScI, which is operated by AURA, Inc., under NASA contract NAS5-26555.Attached Files
Published - Barkana_1999_ApJ_513_L91.pdf
Accepted Version - 9812273.pdf
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Additional details
- Eprint ID
- 96040
- Resolver ID
- CaltechAUTHORS:20190603-130709287
- NASA
- NAS5-26555
- Institute for Advanced Study
- Alfred P. Sloan Foundation
- NASA Hubble Fellowship
- HF-01093.01-97A
- Created
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2019-06-03Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Caltech groups
- TAPIR