Rotational velocities for a new sample of F-K dwarfs with X-ray emission

Details Rotational velocities for a new sample of F-K dwarfs with X-ray emission Rotational velocities for a new sample of F-K dwarfs with X-ray emission

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983pasp...95..268s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 95, April 1983, p. 268-270.

Astronomy and Astrophysics

Astronomy

10

Dwarf Stars, F Stars, K Stars, Radial Velocity, Stellar Rotation, Stellar Spectra, X Ray Astronomy, Fourier Analysis, Line Spectra, Velocity Measurement

Scientific paper

Fourier dissection analysis of an average of five spectral lines has been carried out on high-quality Reticon data of several F-K dwarfs. The slow rotators in the sample support Walter's discovery of a break at P(Rot) = 10 days in the X-ray-rotation relation. The star Epsilon Eri is among the sharpest-lined late-type stars analyzed yet; it appears to be observed at nearly a pole-on orientation. The broadening of a strong magnetically-sensitive line can be explained by the presence of an approximately 600 g field. Finally, although the new data are sparse, they seem to support existing correlations of macroturbulence decreasing with T(eff) and age in solar-type stars.

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