Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..774..223g&link_type=abstract
X-RAY DIAGNOSTICS OF ASTROPHYSICAL PLASMAS: Theory, Experiment, and Observation. AIP Conference Proceedings, Volume 774, pp. 22
Astronomy and Astrophysics
Astrophysics
Atomic Collisions, Astrophysical Plasma, Ionisation, X-Ray Spectra, Auger Effect, Supernova Remnants, Atomic Processes And Interactions, Atomic And Molecular Data, Spectra, And Spectral Parameters, Magnetohydrodynamics And Plasmas, Ionization Of Plasmas, Supernova Remnants, X-Ray
Scientific paper
Our recent investigations on the accuracy of the existing 1s-vacancy fluorescence and Auger data base, which is crucial for the interpretation of spectra from X-ray photoionized plasmas and for supernova remnants under conditions of non-equilibrium ionization, is reviewed. In particular, effects such as non-hydrogenic scaling, correct initial state averaging, configuration interaction (CI), and spin-orbit mixing, which were not included in the earlier calculations but sometimes affect profoundly our computed fluorescence yields, is discussed. Furthermore, the production of 1s-vacancy states through photoabsorption is reviewed, with emphasis on orbital relaxation and spectator Auger broadening of the resonance edge. How our recent oxygen photoabsorption data contribute to elemental abundance studies of the interstellar medium will also be discussed.
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