POSTER PAPER 5.07
Crazy Coronal Abundances
Jeffrey L. Linsky, Rachel Osten, Alex Brown
Institute: JILA, University of Colorado and NIST, Campus Box 440, Boulder, CO 80309-0440, USA
Institute: CASA, University of Colorado, Campus Box 389, Boulder, CO 80309-0389
Contact Email: jlinsky@jila.colorado.edu
Abstract:
Closed magnetic structures in the solar corona show enhanced abundances of
elements with first ionization potentials (FIP) less than 10 eV. Analyses of
Chandra and XMM-Newton spectra of active stars show an inverse FIP bias in
which the low FIP elements are underabundant and some high FIP elements are
overabundant. We propose an explanation for both of these abundance anomalies.
Index Keywords: Chromospheres; Coronae; Activity; Magnetic Fields
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Manuscript submitted: 2001-Aug-17
"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.