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HEAD 2000, November 2000 Session 40. Supernova Remnants/Interstellar Medium

Summary: HEAD 2000, November 2000
Session 40. Supernova Remnants/Interstellar Medium
Oral, Friday, November 10, 2000, 8:00­9:30am, Pago Pago Ballroom
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[40.04] Modeling of Non Equilibrium Ionizing Plasmas:
Applications and Comparison with Supernova Remnant
Observations by the RGS spectrometer
E. Behar, A. Rasmussen, J. Cottam, S.M. Kahn, F.B.S. Paerels, J.R. Peterson, M. Sako (Columbia
Astophysics Laboratory, Columbia University), A.C. Brinkman, A.J.F. den Boggende, J.W. den Herder,
C.P. de Vries, C. Ferrigno, J.S. Kaastra, R. Mewe, T. Tamura, K.J. van der Heyden (Space Research
Organization of the Netherlands), G. Branduardi­Raymont, I. Sakelliou (Mullard Space Science
Laboratory, University College London), M. Audard, M. Gudel (Paul Scherrer Institiute), C. Erd (Space
Science Department, European Space Agency)
Shocked plasmas of young supernova remnants (SNRs) are in a transient (but very long) phase of being
ionized. In these remnants, the temperature is high compared with the charge states present in the
plasma. Consequently, the standard single­ion collisional plasma models are inadequate for analyzing
SNR spectra. We have developed a non equilibrium ionization model that includes two or more
successive charge states. All of the spontaneous and electron­impact atomic processes are incorporated
in the model, including radiative recombination, autoionization, and inner­shell ionization, some of
which can be of vast importance in SNR plasmas. Based on the HULLAC atomic code, the model is


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


Collections: Physics