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Copernicus observations of Iota Herculis velocity variationsObservations of Iota Her at 109.61-109.67 nm obtained with the U1 channel of the Copernicus spectrophotometer at resolution 5 pm during 3.6 days in May, 1979, are reported. Radial-velocity variations are detected and analyzed as the sum of two sinusoids with frequencies 0.660 and 0.618 cycles/day and amplitudes 9.18 and 8.11 km/s, respectively. Weak evidence supporting the 13.9-h periodicity seen in line-profile variations by Smith (1978) is found.
Document ID
19850036090
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Rogerson, J. B., Jr. (Princeton University New Observatory, Princeton, NJ, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1984
Publication Information
Publication: Astronomical Journal
Volume: 89
ISSN: 0004-6256
Subject Category
ASTRONOMY
Funding Number(s)
CONTRACT_GRANT: NAGW-477
CONTRACT_GRANT: NAS5-23576
Distribution Limits
Public
Copyright
Other