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Coronae of Cool Stars

Published online by Cambridge University Press:  26 May 2016

M. Audard ,
S. A. Drake ,
M. Güdel ,
R. Mewe ,
R. Pallavicini ,
T. Simon ,
K. P. Singh ,
S. L. Skinner  and
N. E. White
M. Audard
Affiliation:
1Columbia University
S. A. Drake
Affiliation:
2USRA 3NASA/GSFC
M. Güdel
Affiliation:
4Paul Scherrer Institut
R. Mewe
Affiliation:
5SRON-Utrecht
R. Pallavicini
Affiliation:
6Palermo Observatory
T. Simon
Affiliation:
7University of Hawaii
K. P. Singh
Affiliation:
8Tata Institute of Fundamental Research
S. L. Skinner
Affiliation:
9CASA/Univ. of Colorado
N. E. White
Affiliation:
3NASA/GSFC

Abstract

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We present preliminary results of grating observations of YY Mensae and V824 Arae by Chandra and XMM-Newton. Spectral features are presented in the context of the emission measure distributions, the coronal abundances, and plasma electron densities. In particular, we observe a coronal N/C enhancement in YY Men believed to reflect the photospheric composition (CN cycle). Finally, we interpret line broadening in YY Men as Doppler thermal broadening in its very hot corona.

Type
Part 5: Stellar Magnetic Activity and Evolution
Information
Symposium - International Astronomical Union , Volume 219: Stars as Suns : Activity, Evolution and Planets , 2004 , pp. 243 - 248
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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