Dielectronic recombination, ionization equilibrium, and radiative emission for astrophysically abundant elements

Astronomy and Astrophysics – Astrophysics

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Scientific paper

Dielectronic recombination often plays the dominant role in determining the ionization-recombination balance of multiply-charged atomic ions in low-density high-temperature plasmas. We have carried out systematic calculations of the total dielectronic recombination rates, the corona ionization equilibrium abundances, and the radiative emission rates for all the astrophysically important elements, including Fe and Ni. These calculations demonstrated that the inclusion of the dielectronic recombination rates produces a substantial shift in the corona equilibrium abundances of certain charge-states. This shift can have an important effect on the theoretical prediction of the radiative energy loss rates and of the diagnostically important spectral line intensities.

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