Chromospheric emission and rotation of the Hyades lower main sequence

Details Chromospheric emission and rotation of the Hyades lower main sequence Chromospheric emission and rotation of the Hyades lower main sequence

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984pasp...96..707d&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 96, Sept. 1984, p. 707-713. Research supported by the N

Astronomy and Astrophysics

Astronomy

67

Chromosphere, Main Sequence Stars, Stellar Radiation, Stellar Rotation, Angular Momentum, Dwarf Stars, F Stars, G Stars, Late Stars, Stellar Spectra

Scientific paper

The identity of chromospheric Ca II H- and K-line emission has been monitored for two seasons in a large sample of Hyades F and G dwarfs. Mean emission levels vary smoothly with spectral type, suggesting that the rotation rate at a given spectral type varies relatively little, and that the rotation rate decreases smoothly as a function of mass. In this case the mechanism which controls pre-main-sequence angular momentum loss in late-type stars must be self-regulating to a high degree.

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