Journal article
AGN Outflows in Emission and Absorption: The SDSS Perspective
30 Mar 2006
Abstract
A variety of investigations have demonstrated commonalities between the
Baldwin (1977) Effect, the blueshifting of CIV emission lines (e.g., Gaskell
1982; Richards et al. 2002), and the L_UV-L_X relationship (e.g., Avni &
Tananbaum 1982; Strateva et al. 2005; Steffen et al. 2006); indeed all three of
these observational effects may be manifestations of the same underlying (but
still uncertain) physics. This commonality is of interest to investigations of
accretion disk winds (e.g., Murray et al. 1995; Proga et al. 2000) from active
galactic nuclei (AGN) as there is evidence that broad absorption line quasars
(BALQSOs) are drawn from a parent sample of quasars that exhibit larger than
average CIV blueshifts, weaker than average CIV emission line strengths, and
bluer than average (intrinsic) colors. The properties of the absorption troughs
appear to be dependent upon these parameters. Thus, it is suggested that not
all quasars will host bona-fide BAL troughs, but that all (broad emission line)
quasars host outflows of some type, the structure of which is strongly
dependent on the quasar's spectral energy distribution.
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Details
- Title
- AGN Outflows in Emission and Absorption: The SDSS Perspective
- Creators
- Gordon T Richards
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Identifiers
- 991019201373804721