Rotation of FK Comae

Details Rotation of FK Comae Rotation of FK Comae

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..306r&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, March 1990, p. 306-311.

Astronomy and Astrophysics

Astronomy

23

Fourier Transformation, G Stars, Giant Stars, Stellar Rotation, Angular Momentum, Data Processing, Spectrum Analysis, Stellar Evolution

Scientific paper

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 + or - 4 km/s, 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. It angular momentum is about 3 times smaller than that of the orbital motion in a typical W UMa-type system.

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