A Study of the Coronal Plasma in RS CVn binary systems

Details A Study of the Coronal Plasma in RS CVn binary systems A Study of the Coronal Plasma in RS CVn binary systems

2001-09-17

arxiv.org/abs/astro-ph/0109268v1

Astron.Astrophys. 398 (2003) 1137-1150

Astronomy and Astrophysics

Astrophysics

to appear in The Twelfth Cool Stars, Stellar Systems and the Sun, eds. A. Brown, T.R. Ayres, G.M. Harper, (Boulder: Univ. of C

Scientific paper

10.1051/0004-6361:20021737

XMM-Newton has been performing comprehensive studies of X-ray bright RS CVn binaries in its Calibration and Guaranteed Time programs. We present results from ongoing investigations in the context of a systematic study of coronal emission from RS CVns. We concentrate in this paper on coronal abundances and investigate the abundance pattern in RS CVn binaries as a function of activity and average temperature. A transition from an Inverse First Ionization Potential (FIP) effect towards an absence of a clear trend is found in intermediately active RS CVn systems. This scheme corresponds well into the long-term evolution from an IFIP to a FIP effect found in solar analogs. We further study variations in the elemental abundances during a large flare.

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