Published August 1997
| Published + Submitted
Journal Article
Open
Keck Spectroscopy of the Gravitational Lens System PG 1115+080: Redshifts of the Lensing Galaxies
Chicago
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Abstract
The quadruple system PG 1115+080 is the second gravitational lens with a reported measurement of the Hubble constant. In addition to the primary lens, three nearby galaxies are believed to contribute significantly to the lensing potential. In this paper we report accurate redshifts for all four galaxies and show that they belong to a single group at z_d = 0.311. This group has very similar properties to Hickson's compact groups of galaxies found at lower redshifts. We briefly discuss implications for the existing lens models and derive H_0 = 52±14 km s^(-1) Mpc^(-1).
Additional Information
© 1997 American Astronomical Society. Provided by the NASA Astrophysics Data System. Received 1997 April 15; revised 1997 May 13. Based on observations obtained at the W. M. Keck Observatory, which is operated jointly by the California Institute of Technology and the University of California. We thank D. W. Hogg and S. Malhotra for helpful conversations. This work was supported by NSF Grant No. AST-95-29170 and NASA Grant No. NAG-5-3834.Attached Files
Published - 1997AJ____114__507K.pdf
Submitted - 9704109.pdf
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1997AJ____114__507K.pdf
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Additional details
- Eprint ID
- 95847
- Resolver ID
- CaltechAUTHORS:20190529-101258090
- NSF
- AST 95-29170
- NASA
- NAG 5-3834
- Created
-
2019-05-29Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field