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Observations of the circumstellar gas shells around Betelgeuse and AntaresResults are presented on the direct observations of the circumstellar shell around alpha-Ori, along with new observations of the Ca II infrared triplet lines which provide lower limits for the Ca(+) shell radii for alpha-Ori and alpha-Sco (Antares). The 8542-A line in alpha-Ori does not show a circumstellar absorption core, and the shell radius limit is estimated to be at least 31 times stellar radius. A 108-mA circumstellar core is observed in the 8542-A line in Antares for which a shell radius equal to 4.0 times stellar radius is suggested. The discovery of circumstellar emission through resonance line scattering will provide valuable additional information on the physical conditions in the shell.
Document ID
19760030054
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bernat, A. P.
(Texas Univ. Austin, TX, United States)
Lambert, D. L.
(Texas, University Austin; McDonald Observatory, Fort Davis, Tex., United States)
Date Acquired
August 8, 2013
Publication Date
November 1, 1975
Publication Information
Publication: Astrophysical Journal
Volume: 201
Subject Category
Astrophysics
Accession Number
76A13020
Funding Number(s)
CONTRACT_GRANT: NSG-5005
Distribution Limits
Public
Copyright
Other

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