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Dramatic Change in the Spectrum of FeLoBAL SDSS J163255.46+420407.7

Published online by Cambridge University Press:  03 June 2010

Kentaro Aoki  and
Toru Misawa
Kentaro Aoki
Affiliation:
Subaru Telescope, National Astronomical Observatory of Japan, 650 North A‘ohoku Place, Hilo, HI 96720, USA Email: [email protected]
Toru Misawa
Affiliation:
Institute of Physical and Chemical Research (RIKEN), 2-1, Hirosawa, Wako-si, Saitama, 351-0198, Japan
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Abstract

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We serendipitiously found that the iron-rich low-ionization broad absorption-line (FeLoBAL) quasar SDSS J 163255.46+420407.7 showed a dramatic change in its spectrum over 3.4 years in the rest frame of the quasar. A simple photoionization model suggests the increase in the nuclear radiation caused these changes. Given the recombination coefficient of Fe+, the relaxation time of the absorbing gas suggests ne > 104 cm−3.

Keywords

galaxies: activequasars: individual (SDSS J 163255.46+420407.7)quasars: absorption lines
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S267: Co-Evolution of Central Black Holes and Galaxies , August 2009 , pp. 104
Copyright
Copyright © International Astronomical Union 2010