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HR 1362 - A test case for stellar dynamo theoriesAn analysis of 11 yr of photometry of HR 1362 = EK Eri has shown a well-established photometric period of 335 days. This confirms an earlier period determination of about 310 days from 3 yr of APT data and is consistent with a new v sin i determination of 2 + or - 2 km/s. Recent Ca II H and K observations show moderately strong H and K emission lines at a flux level of log F prime (K) of about 6.5 ergs sq m/s. If the photometric period is interpreted as the rotation period, this surface flux is more than one order of magnitude larger than what can be expected from empirical activity versus rotation relationships. The spectrum and the U-B and B-V colors are consistent with a single G8 III-IV spectral classification, while the V-R and V-I values indicate a small color excess, typical of chromospherically active stars.
Document ID
19900037853
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Strassmeier, Klaus G.
(Vanderbilt University; Tennessee State University, Nashville, United States)
Hall, Douglas S.
(Vanderbilt University Nashville, TN, United States)
Barksdale, William S.
(Barksdale Observatory Winter Park, FL, United States)
Jusick, Anthony T.
(Stetson University DeLand, FL, United States)
Henry, Gregory W.
(Tennessee State University Nashville, United States)
Date Acquired
August 14, 2013
Publication Date
February 10, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 350
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
90A24908
Funding Number(s)
CONTRACT_GRANT: NAG8-111
Distribution Limits
Public
Copyright
Other

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