The Radii of Solar Neighborhood ZAMS Stars

Details The Radii of Solar Neighborhood ZAMS Stars The Radii of Solar Neighborhood ZAMS Stars

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003csss...12..912a&link_type=abstract

The Future of Cool-Star Astrophysics: 12th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (2001 July 30 - August

Astronomy and Astrophysics

Astrophysics

4

Scientific paper

Constraints from optical data suggest that several members of a small but homogeneous sample of solar neighborhood, Pleiades-age, K dwarfs have radii that are 0.1-0.2 Rsun larger than the main sequence radius expected from their spectral types, implying that they may be slightly pre-main sequence. Alternatively, recent theoretical work indicates that strong magnetic fields may inhibit convection enough to distort measured V and (bv) values (and possibly spectral types); this, in turn, could skew certain radius calculations. Thus the stars might be slightly earlier (and more massive) than their spectral classes indicate, and already on the ZAMS.

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