Emission Measure Distributions in Active Binary Systems
Jorge Sanz-Forcada
Institute:
Harvard-Smithsonian Center for Astrophysics
Contact Email: jsanz@cfa.harvard.edu
Abstract:
Generally, the study of coronal structure in other cool stars
different from the Sun is limited to 2-T or 3-T emission measure fits,
and only a few cases are described with a continuous distribution of
values in temperature. In this work it is presented the study of 22 active
binary systems and 6 single stars, the widest sample of stars to date
for which the emission measure distribution is described as a
continuous distribution. The analysis covers the range
log~T(K)=4.0-7.4, making use of EUVE iron lines and IUE data to
describe the behavior in the corona and transition
region. Conclusions are derived from the quiescent and
flaring stages in 6 active binary systems, and the whole sample
includes a variety of spectral types in giant and dwarf stars. The
calculated distributions do not match, totally or partially, those
predicted by current models.
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Manuscript submitted: 2001-September-6
"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.