Coronae of Cool Stars

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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.
To appear in IAU Symp. 219, ``Stars as Suns: Activity, Evolution, Planets'', ed. A. K. Dupree & A. O. Benz (San Francisco: ASP)

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Astrophysics

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http://salesiana.dossiersoluciones.com/handle/123456789/6613

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/astro-ph/0310032
 http://arxiv.org/abs/astro-ph/0310032

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arXiv