Bibcode
Ball, B.; Drake, J. J.; Lin, L.; Kashyap, V.; Garcia-Alvarez, D.
Referencia bibliográfica
American Astronomical Society, HEAD meeting #8, #05.07; Bulletin of the American Astronomical Society, Vol. 36, p.914
Fecha de publicación:
8
2004
Número de citas
0
Número de citas referidas
0
Descripción
We present an analysis of high resolution Chandra spectra of the contact
binaries 44i Boo and VW Cep in order to examine the chemical composition
of their coronae. The emerging pattern of coronal abundances in
different stars is of a general trend in which low activity stars
exhibit a solar-like FIP effect that is seen to gradually reverse itself
to a pattern in which high FIP elements are enhanced in more active
stars. We compare the abundances in the coronae of 44i Boo and VW Cep to
those of other active stars and discuss the influence of stellar
parameters and rotation rate in determining the chemical fractionation
of coronal plasma.
BB and DGA were supported by Chandra grants GO1-2006X and GO1-2012X. LL
was supported by NASA AISRP contract NAG5-9322. JJD and VK were
supported by NASA contract NAS8-39073 to the Chandra X-ray Center.