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19 April 2024 |
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An FeLoBAL Binary Quasar | | Michael D. Gregg
; Robert H. Becker
; Richard L. White
; Gordon T. Richards
; Fred H. Chaffee
; Xiaohui Fan
; | | Date: |
11 Jun 2002 | | Subject: | astro-ph | | Affiliation: | U.C. Davis/LLNL), Richard L. White (STScI), Gordon T. Richards (Penn State), Fred H. Chaffee (Keck Obs.), Xiaohui Fan (IAS | | Abstract: | In an ongoing infrared imaging survey of quasars at Keck Observatory, we have discovered that the z=1.285 quasar SDSS J233646.2-010732.6 comprises two point sources with a separation of 1.67". Resolved spectra show that one component is a standard quasar with a blue continuum and broad emission lines; the other is a broad absorption line (BAL) quasar, specifically, a BAL QSO with prominent absorption from MgII and metastable FeII, making it a member of the ``FeLoBAL’’ class. The number of known FeLoBALs has recently grown dramatically from a single example to more than a dozen, including a gravitationally lensed example and the binary member presented here, suggesting that this formerly rare object may be fairly common. Additionally, the presence of this BAL quasar in a relatively small separation binary adds to the growing evidence that the BAL phenomenon is not due to viewing a normal quasar at a specific orientation, but rather that it is an evolutionary phase in the life of many, if not all, quasars, and is particularly associated with conditions found in interacting systems. | | Source: | arXiv, astro-ph/0206163 | | Services: | Forum | Review | PDF | Favorites | |
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