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ELEMENTAL ABUNDANCES IN STELLAR CORONAE WITH XMM-NEWTON M. Audard and M.Gudel
 

Summary: 1
ELEMENTAL ABUNDANCES IN STELLAR CORONAE WITH XMM-NEWTON
M. Audard and M.Gudel
Paul Scherrer Institut, Wurenlingen and Villigen, 5232 Villigen PSI, Switzerland
Abstract
The XMM-Newton Re ection Grating Spectrometer
Team has obtained observations of a large number of coro-
nal sources of various activity levels, ages, and spectral
types. In particular, X-ray bright RS CVn binary sys-
tems display saturated coronal emission with spectral lines
characteristic of hot (10-30 MK) plasma. Furthermore,
we have obtained XMM-Newton data from young solar
analogs both within and outside the X-ray saturation reg-
ime. We have simultaneously analyzed the EPIC MOS and
RGS data from these objects and have obtained coronal
abundances of various elements (e.g., C, N, O, Ne, Mg,
Si, Fe). We show that there is evidence for a transition
from an Inverse First Ionization Potential (FIP) e ect in
most active stars to a \normal" solar-like FIP e ect in less
active stars. We discuss this result with regard to photo-

  

Source: Audard, Marc - INTEGRAL Science Data Centre & Observatory of Geneva, Université de Genève
Guedel, Manuel - Institut für Astronomie, Universität Wien

 

Collections: Physics