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The binary companion of the classical Cepheid AW PerAn analysis of IUE spectra of the companion of AW Per shows it to be an extreme BpSi/HeW star with a spectral type of B7 V to B8 V. The flux of the composite spectrum from 1200 A through V is found to be well matched by F7 Ib and B8 V standard stars with Delta M(V) = 3.1 mag. The results suggest that the mass of the Cepheid must be greater than 4.7 solar masses. The flux distribution of the star and the mass limits from the orbit are consistent with a companion that is itself a binary.
Document ID
19890054600
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Evans, Nancy Remage
(David Dunlap Observatory; Toronto, University Canada; Computer Sciences Corp., Silver Spring, MD, United States)
Date Acquired
August 14, 2013
Publication Date
June 1, 1989
Publication Information
Publication: Astronomical Journal
Volume: 97
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
89A41971
Funding Number(s)
CONTRACT_GRANT: NAS5-28749
Distribution Limits
Public
Copyright
Other

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