Chromosphric Activity and Evolution of ``Maunder Minimum" Stars

Details Chromosphric Activity and Evolution of ``Maunder Minimum" Stars Chromosphric Activity and Evolution of ``Maunder Minimum" Stars

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.0301w&link_type=abstract

American Astronomical Society Meeting 204, #03.01; Bulletin of the American Astronomical Society, Vol. 36, p.671

Astronomy and Astrophysics

Astronomy

Scientific paper

Many stars previously identified as ``Maunder minimum'' stars are actually slightly evolved off the main sequence. We extracted activity measurements from the California and Carnegie Planet Search program stars and Hipparcos parallaxes to demonstrate that the relation often used to derive ages of main sequence stars breaks down as a star evolves off the main sequence. We find that stars only 1 magnitude above the main sequence exhibit significantly supressed activity levels which have been mistaken for examples of ``Maunder minimum'' behavior.

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