The activity cycles of stars

Details The activity cycles of stars The activity cycles of stars

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981sciam.244..104w&link_type=abstract

Scientific American, vol. 244, Feb. 1981, p. 104-107, 111-114, 116, 119.

Physics

1

Periodic Variations, Solar Activity, Stars, Stellar Atmospheres, Sunspot Cycle, Chromosphere, Main Sequence Stars, Spectroheliographs, Stellar Rotation

Scientific paper

The activity cycle of the sun is reviewed with attention to the contributions of Galileo, Schwabe, Wolf, Maunder, Carrington, Hale, Babcock and Parker. The use of the H-K photometer in the observation of the chromospheric variability of 91 sun-like stars at the Mount Wilson Observatory is discussed. It is estimated that more than half of the main-sequence stars less massive than 1.5 solar masses may show cyclic behavior. The chromospheric variations for 12 sunlike stars are given.

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