POSTER PAPER 5.19
The Radii of Solar Neighborhood ZAMS Stars
C.W. Ambruster, F.C. Fekel, Jr., A. Brown
Institute: Villanova University
Institute: Center of Excellence, Tennessee State University
Institute: CASA, University of Colorado
Contact Email: ca@ast.villanova.edu
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
(B-V) 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.
Index Keywords:
Previous: Stern
Up: Poster Index
Up: Top Index
Manuscript submitted: 2001-Aug-20
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.