The Age Decay of Stellar Magnetic Activity in MS Field Solar Type Stars
Vazquez, M.; Cabestany, J.
Spain
Abstract
The age decay of two indicators of the stellar magnetic activity (λ 2800 MgII emission flux and λ 10830 HeI 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 MgII has been determined and compared with a similar one, recently published, for the CaII K emission. The greater scatter in the HeI results is atributed to the different rotation rates.