Summary: HEAD 2000, November 2000
Session 45. Stellar Coronae/Cataclysmic Variables
Oral, Friday, November 10, 2000, 10:10­11:30am, Pago Pago Ballroom
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[45.03] Stellar Coronal Spectroscopy with the XMM­Newton
RGS
M. Guedel, M. Audard (Paul Scherrer Institut PSI, Switzerland), E. Behar, J. Cottam, S.M. Kahn, F.B.S.
Paerels, J.M. Peterson, A.P. Rasmussen (Columbia University, USA), G. Branduardi­Raymont, I.
Sakelliou (MSSL, UK), A.J. den Boggende, A.C. Brinkman, J.W. den Herder, J.S. Kaastra, R. Mewe, T.
Tamura, C. de Vries (SRON­Utrecht, The Netherlands), C. Erd (ESTeC/ESA, The Netherlands), XMM
Collaboration
High resolution X­ray spectroscopy opens new windows to the study of the structuring and energetics of
stellar coronae. XMM­Newton has obtained excellent spectra of several stellar coronal sources (e.g.,
HR1099, Capella, YY Gem, and AB Dor) with its two Reflection Grating Spectrometers (RGS). These
sources represent coronae of various activity levels, comprising a wide range of plasma temperatures.
Several flares were observed in the course of the observations for which time­resolved RGS
spectroscopy will be presented. The RGS spectra offer important diagnostics to probe properties of the
coronal plasma. The large number of detected lines from various elements offer the possibility to
determine emission measure distributions between approximately 1­20 MK. He­like triplets further
provide information on electron densities at various temperatures. Coronal elemental abundances are

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

Collections: Physics