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Instabilities in line-driven stellar winds. III - Wave propagation in the case of pure line absorptionThe spatial and temporal evolution of small-amplitude velocity perturbations is examined in the idealized case of a stellar wind that is driven by pure line absorption of the star's continuum radiation. It is established that the instability in the supersonic region is of the advective type relative to the star, but of the absolute type relative to the wind itself. It is also shown that the inward propagation of information in such a wind is limited to the sound speed, in contrast to the theory of Abbott, which predicts inward propagation faster than sound. This apparent contradiction is resolved through an extensive discussion of the analytically soluble case of zero sound speed.
Document ID
19870033167
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Owocki, S. P.
(California, University La Jolla, United States)
Rybicki, G. B.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
August 13, 2013
Publication Date
October 1, 1986
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 309
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
87A20441
Funding Number(s)
CONTRACT_GRANT: NAG8-463
CONTRACT_GRANT: NSG-7406
Distribution Limits
Public
Copyright
Other

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