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Chromospherically active stars. IV - HD 178450 = V478 Lyr: An early-type BY Draconis type binaryIt is shown that the variable star HD 178450 = V478 Lyr is a chromospherically active G8 V single-lined spectroscopic binary with a period of 2.130514 days. This star is characterized by strong UV emission features and a filled-in H-alpha absorption line which is variable in strength. Classified as an early-type BY Draconis system, it is similar to the BY Dra star HD 175742 = V775 Her. The unseen secondary of HD 178450 has a mass of about 0.3 solar masses and is believed to be an M2-M3 dwarf.
Document ID
19880036072
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1086/114630
Authors
Fekel, Francis C. (Dyer Observatory Nashville, TN, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Astronomical Journal
Volume: 95
ISSN: 0004-6256
Subject Category
Astrophysics
Accession Number
88A23299
Funding Number(s)
CONTRACT_GRANT: NAG5-397
Distribution Limits
Public
Copyright
Other

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