Dielectronic Recombination, Photoionization and Opacities

Details Dielectronic Recombination, Photoionization and Opacities Dielectronic Recombination, Photoionization and Opacities

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..774..305b&link_type=abstract

X-RAY DIAGNOSTICS OF ASTROPHYSICAL PLASMAS: Theory, Experiment, and Observation. AIP Conference Proceedings, Volume 774, pp. 30

Astronomy and Astrophysics

Astrophysics

1

Astrophysical Plasma, Plasma Collision Processes, Ion Recombination, Photoionisation, Opacity, Stellar Internal Processes, Magnetohydrodynamics And Plasmas, Electron Collisions, Ionization Of Plasmas, Stellar Atmospheres, Radiative Transfer, Opacity And Line Formation, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages

Scientific paper

We review methodologies for describing dielectronic recombination (DR). We look briefly at the state-of-play of theory vs experiment. We then discuss how to deliver DR data in a form suitable for modelling and we review the status of the partial and total DR database being assembled for the modelling of dynamic finite-density plasmas. We comment on the role of fields and how modelling l-changing collisions approximately models the dynamic part of the plasma microfield.
We also consider the inverse process of photoionization and discuss how the same approach to DR is being used for inner-shell photoionization and the determination of opacities in stellar interiors. In particular, we pay attention to the role of opacity in connection with the discrepancy between the helioseismology observations and stellar evolution models for the position of the base of the solar convective zone.

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