The Radii of Solar Neighborhood ZAMS Stars
Abstract
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.
- Publication:
-
The Future of Cool-Star Astrophysics: 12th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun
- Pub Date:
- October 2003
- Bibcode:
- 2003csss...12..912A