NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
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
Document Type
Reprint (Version printed in journal)
External Source(s)
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
Funding Number(s)
CONTRACT_GRANT: NAG5-397
Distribution Limits
Public
Copyright
Other