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28 March 2024 |
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A Study of the Coronal Plasma in RS CVn binary systems | M. Audard
; M. Guedel
; A. Sres
; R. Mewe
; A.J.J. Raassen
; E. Behar
; C.R. Foley
; R.L.J. van der Meer
; | Date: |
17 Sep 2001 | Journal: | Astron.Astrophys. 398 (2003) 1137-1150 | Subject: | astro-ph | Affiliation: | 1 and 2), R. Mewe , A.J.J. Raassen (3 and 4), E. Behar , C.R. Foley , R.L.J. van der Meer ( Paul Scherrer Institut, ETHZ, SRON, Astronomical Institute ``Anton Pannekoek’’, Columbia University, MSSL | Abstract: | 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. | Source: | arXiv, astro-ph/0109268 | Services: | Forum | Review | PDF | Favorites |
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