The age decay of stellar magnetic activity in MS field solar-type stars

Details The age decay of stellar magnetic activity in MS field solar-type stars The age decay of stellar magnetic activity in MS field solar-type stars

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..97..151c&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 97, no. 1, Nov. 1983, p. 151-156.

Astronomy and Astrophysics

Astrophysics

1

Demagnetization, Late Stars, Main Sequence Stars, Stellar Evolution, Stellar Magnetic Fields, Abundance, Chromosphere, Helium, Iue, Magnesium, Magnetic Variations, Stellar Spectra

Scientific paper

The age decay of two indicators of the stellar magnetic activity (λ2800 Mg II emission flux and λ10830 He I equivalent width) have been studied for field solar-type stars. The Li abundance has been used, in most of the cases, as a stellar age indicator. A calibrated decay law for Mg II has been determined and compared with a similar one, recently published, for the Ca II K emission. The greater scatter in the He I results is attributed to the different rotation rates.

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