Speaker
Klaus-Peter Schröder
(Universidad de Guanajuato)
Description
We studied the evolutionary age and mass of the solar-type MS
stars of the sample described by Baliunas et al. 1995, of the
Mt. Wilson CaII monitoring programme. Organized by subsamples
of stars with strong and chaotic, moderate (clyclic or not), and
low or absent activity, the activity strength (mean S-value) and
characteristics show a very clear correlation with relative MS age.
This indicates that the MS magnetic breaking timescale is related
to stellar mass effectively in a very similar way, as is the
lifetime of central Hydrogen-burning, i.e. tau approx. M^(-2.8).
We also identified the "true" Maunder Minimum solar analogues,
and we found that cyclic activity seems to be restricted to a)
moderately active stars only, and b) to stars of not much more
than a solar mass.
Primary author
Klaus-Peter Schröder
(Universidad de Guanajuato)
