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Spectroscopic studies of Wolf-Rayet stars. III - The WC subclassWolf-Rayet (W-R) stars, which are the descendants of massive O-type stars, can be subdivided into three groups depending on their spectral appearance. These groups include the nitrogen class (WN), the carbon class (WC), and the oxygen class (WO). The present paper is concerned with the WC stars. The assignment of WC subtypes has been based on visual inspections of photographic plates. One of the aims of this study is related to the quantification of the visual estimates. The measured ratios of equivalent widths and the FWHM of the 4650 A line for Galactic and LMC stars are presented, and the reclassification of some stars is proposed on this basis. In particular, it is shown that the majority of the LMC WC stars should logically be classified WC4 instead of WC5. Comments on individual stars are provided, and terminal velocities are discussed. It is attempted to give a complete overview of the most important spectroscopic features of the WC stars in the optical region.
Document ID
19860040421
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Torres, A. V.
(Joint Inst. for Lab. Astrophysics Boulder, CO, United States)
Conti, P. S.
(Joint Institute for Laboratory Astrophysics Boulder, CO, United States)
Massey, P.
(Kitt Peak National Observatory Tucson, AZ, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1986
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 300
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
86A25159
Funding Number(s)
CONTRACT_GRANT: NSF AST-83-12964
CONTRACT_GRANT: NAS5-26409
Distribution Limits
Public
Copyright
Other

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