Article (Scientific journals)
Decelerated flows of matter around the quasars PHL 5200 and RS 23
Surdej, Jean; Swings, Jean-Pierre
1981In Astronomy and Astrophysics, 96, p. 242-253
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Keywords :
RADIATIVE TRANSFER; STELLAR MASS EJECTION; STELLAR SPECTRA; EMISSION SPECTRA; LINE SPECTRA; MATHEMATICAL MODELS; RESONANCE LINES; QUASARS
Abstract :
[en] Line profile calculations are performed within the framework of the Sobolev approximation in order to simulate the P Cygni-like profiles observed for the resonance doublets of C IV and Si IV in the spectrum of the quasar PHL 5200 and of C IV in that of RS 23. Taking into account the structure of the resonance doublets and the nonlocal transfer of line photons in an outward-decelerating envelope, it is shown that good agreement between the theory and the observations is achieved for symmetrically spherical outward-flows decelerated in the gravitational field of the central quasars.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Swings, Jean-Pierre ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Language :
English
Title :
Decelerated flows of matter around the quasars PHL 5200 and RS 23
Publication date :
01 March 1981
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
96
Pages :
242-253
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 02 August 2009

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