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24 April 2024 |
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The Redshift of a Lensing Galaxy in PMN J0134-0931 | | Patrick B. Hall
; Gordon T. Richards
; Donald G. York
; Charles R. Keeton
; David V. Bowen
; Donald P. Schneider
; David J. Schlegel
; J. Brinkmann
; | | Date: |
15 Jul 2002 | | Journal: | Astrophys.J. 575 (2002) L51-L54 | | Subject: | astro-ph | | Affiliation: | 1,2), Gordon T. Richards , Donald G. York , Charles R. Keeton , David V. Bowen , Donald P. Schneider , David J. Schlegel , J. Brinkmann ( Princeton U., U. Catolica de Chile, Penn State U., U. Chicago, Apache Point Observatory | | 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 J0134-0931. 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 CDE 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. Detecting mm-wave molecular line absorption from the lensing galaxy or galaxies may be possible in PMN J0134-0931, just as in the lenses PKS1830-211 and B0218+357. Well-constructed optical quasar surveys like the SDSS can contribute to the detection and study of reddened quasars. (Expanded) | | Source: | arXiv, astro-ph/0207317 | | Services: | Forum | Review | PDF | Favorites | |
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