ROTATION OF FK COMAE

V sin i for the rapidly rotating G-type giant FK Com is estimated using high-resolution coude spectra and the Fourier transform approach. The result, V sin i = 159 ± 4 km s⁻¹, agrees well with recent determinations which used direct comparison of FK Com spectra with those of artificially broadened s...

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Bibliographic Details
Published in:Publications of the Astronomical Society of the Pacific 1990-03, Vol.102 (649), p.306-311
Main Author: RUCINSKI, S. M.
Format: Article
Language:English
Subjects:
ANGULAR MOMENTUM
Astronomy
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPARATIVE EVALUATIONS
DATA PROCESSING
Earth, ocean, space
Exact sciences and technology
FOURIER TRANSFORMATION
Fourier transformations
Giant and subgiant stars
GIANT STARS
INTEGRAL TRANSFORMATIONS
Limb darkening
Line spectra
Main sequence stars
MOTION
Normal stars (by class): general or individual
PROCESSING
ROTATION
Rotational spectra
SPECTRA
STAR EVOLUTION
STARS
Stellar classification
Stellar rotation
Stellar spectra
TRANSFORMATIONS 640102 > Astrophysics & Cosmology-- Stars & Quasi-Stellar, Radio & X-Ray Sources
Velocity
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Summary:V sin i for the rapidly rotating G-type giant FK Com is estimated using high-resolution coude spectra and the Fourier transform approach. The result, V sin i = 159 ± 4 km s⁻¹, agrees well with recent determinations which used direct comparison of FK Com spectra with those of artificially broadened standards. If FK Com does not differ drastically in its internal structure from more normal stars, its angular momentum is a few (perhaps 10) times larger than for single rapidly rotating stars following standard relations for the upper main sequence. Its angular momentum is about 3 times smaller than that of the orbital motion in a typical W UMa-type system.
ISSN:0004-6280
1538-3873
DOI:10.1086/132635