The Influence of Chemi-ionization and Recombination Processes on Spectral Line Shapes in Stellar Atmospheres

Details The Influence of Chemi-ionization and Recombination Processes on Spectral Line Shapes in Stellar Atmospheres The Influence of Chemi-ionization and Recombination Processes on Spectral Line Shapes in Stellar Atmospheres

2011-12-28

arxiv.org/abs/1112.6087v1

Baltic Astronomy, Vol. 20, p. 566-571, 2011

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

arXiv admin note: substantial text overlap with arXiv:1105.2134

Scientific paper

In this work, the chemi-ionization processes in atom- Rydberg atom collisions, as well as the corresponding chemi-recombination processes are considered as factors of influence on the atom exited-state populations in weakly ionized layers of stellar atmospheres. The presented results are related to the photospheres of the Sun and some M red dwarfs as well as weakly ionized layers of DB white dwarfs atmospheres. It has been found that the mentioned chemi ionization/recombination processes dominate over the relevant concurrent electron-atom and electron-ion ionization and recombination process in all parts of considered stellar atmospheres. The obtained results demonstrate the fact that the considered chemi ionization/recombination processes must have a very significant influence on the optical properties of the stellar atmospheres. Thus, it is shown that these processes and their importance for non-local thermodynamic equilibrium (non-LTE) modeling of the solar atmospheres should be investigated further.

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