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The steady state solutions of radiatively driven stellar winds for a non-Sobolev, pure absorption modelThe steady state solution topology for absorption line-driven flows is investigated for the condition that the Sobolev approximation is not used to compute the line force. The solution topology near the sonic point is of the nodal type with two positive slope solutions. The shallower of these slopes applies to reasonable lower boundary conditions and realistic ion thermal speed v(th) and to the Sobolev limit of zero of the usual Castor, Abbott, and Klein model. At finite v(th), this solution consists of a family of very similar solutions converging on the sonic point. It is concluded that a non-Sobolev, absorption line-driven flow with a realistic values of v(th) has no uniquely defined steady state. To the extent that a pure absorption model of the outflow of stellar winds is applicable, radiatively driven winds should be intrinsically variable.
Document ID
19900054790
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Poe, C. H.
(High Altitude Observatory Boulder, CO, United States)
Owocki, S. P.
(Delaware, University Newark, United States)
Castor, J. I.
(Lawrence Livermore National Laboratory Livermore, CA, United States)
Date Acquired
August 14, 2013
Publication Date
July 20, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 358
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
90A41845
Funding Number(s)
CONTRACT_GRANT: W-7405-ENG-48
CONTRACT_GRANT: NAGW-1487
CONTRACT_GRANT: NSF AST-88-14580
Distribution Limits
Public
Copyright
Other

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