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On the Radiative Acceleration of Quasar Absorption Line Clouds

Goldreich, Peter (1978) On the Radiative Acceleration of Quasar Absorption Line Clouds. Physica Scripta, 17 (3). pp. 225-228. ISSN 0031-8949. doi:10.1088/0031-8949/17/3/015.

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Radiation may expel dense gas clouds from quasar emission line regions. Small clouds can be accelerated to velocities approaching c if they are confined so as to maintain high densities. The kinetic energies, inferred from the spectra, of low to medium excitation quasar absorption clouds are too large for radiation pressure to have played a dominant role in their acceleration. If these clouds are physically associated with the quasars, they are probably accelerated by the same stresses that are responsible for their confinement. Models for absorption clouds based on radiatively driven instabilities in expanding quasar envelopes predict column densities that are much larger than those deduced from observation.

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Additional Information:© 1978 Institute of Physics. Received August 17, 1977. I thank Dr. W. L. W. Sargent for many informative discussions. This research was supported by NSF grant AST 76-24281.
Group:UNSPECIFIED, Division of Geological and Planetary Sciences
Funding AgencyGrant Number
NSFAST 76-24281
Issue or Number:3
Record Number:CaltechAUTHORS:20130305-151706819
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Official Citation:On the radiative acceleration of quasar absorption line clouds. Peter Goldreich (California Institute of Technology, Pasadena, California, U.S.A.) Physica Scripta (Sweden) 17, 225-228, 1918
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37327
Deposited By: Ruth Sustaita
Deposited On:05 Mar 2013 23:33
Last Modified:12 Jul 2022 19:50

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