The Redshift of a Lensing Galaxy in PMN J0134-0931
Abstract
The Sloan Digital Sky Survey (SDSS) automatically targeted as a quasar candidate the recently discovered, gravitationally lensed, extremely reddened z=2.2 quasar PMN 0134-0931. The SDSS spectrum exhibits Ca II absorption at z=0.76451, which we identify as the redshift of a lensing galaxy. Hubble Space Telescope imaging shows that components C, D, and E of the system are significantly redder than components A or B and detects faint galaxy emission between D and A+B. The redshift of the dust responsible for the reddening remains unconstrained with current data. However, we outline a model wherein lensing and differential reddening by a z=0.76451 galaxy pair can entirely explain this system.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 2002
- DOI:
- 10.1086/342784
- arXiv:
- arXiv:astro-ph/0207317
- Bibcode:
- 2002ApJ...575L..51H
- Keywords:
-
- ISM: Dust;
- Extinction;
- Cosmology: Gravitational Lensing;
- Galaxies: Quasars: Individual: Alphanumeric: PMN J0134-0931;
- Astrophysics
- E-Print:
- Accepted to ApJL. 6 pages, 3 figures, 1 table. A non-technical writeup is available through starstuff.org at http://www.starstuff.org/default.asp?cover=/articles/1126.asp