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Open Astronomy

formerly Baltic Astronomy

Editor-in-Chief: Barbuy, Beatriz


IMPACT FACTOR 2018: 0.350

CiteScore 2018: 0.24

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ICV 2017: 121.03

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2543-6376
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Volume 20, Issue 4

Issues

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

Anatolij A. Mihajlov
  • Corresponding author
  • Institute of Physics, University of Belgrade, P.O. Box 57, 11001 Belgrade, Serbia Serbia
  • Isaac Newton Institute of Chile, Yugoslavia Branch, Volgina 7, 11060 Belgrade, Serbia
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Ljubinko M. Ignjatović
  • Institute of Physics, University of Belgrade, P.O. Box 57, 11001 Belgrade, Serbia Serbia
  • Isaac Newton Institute of Chile, Yugoslavia Branch, Volgina 7, 11060 Belgrade, Serbia
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Vladimir A. Srécković
  • Institute of Physics, University of Belgrade, P.O. Box 57, 11001 Belgrade, Serbia Serbia
  • Isaac Newton Institute of Chile, Yugoslavia Branch, Volgina 7, 11060 Belgrade, Serbia
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Milan S. Dimitrijević
  • Isaac Newton Institute of Chile, Yugoslavia Branch, Volgina 7, 11060 Belgrade, Serbia France
  • Astronomical Observatory, Volgina 7, 11060 Belgrade, Serbia France
  • Observatoire de Paris, 92195 Meudon Cedex, France
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2017-03-23 | DOI: https://doi.org/10.1515/astro-2017-0337

Abstract

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 dwarf atmospheres. It has been found that the mentioned chemi-ionization and recombination processes dominate over the concurrent electron-atom and electron-ion ionization and recombination processes in all parts of the considered stellar atmospheres. The obtained results demonstrate the fact that the considered processes must have significant influence on the optical properties of stellar atmospheres. 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.

Keywords: stars; atomic processes

References

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About the article

Received: 2011-08-08

Accepted: 2011-08-15

Published Online: 2017-03-23

Published in Print: 2011-12-01


Citation Information: Open Astronomy, Volume 20, Issue 4, Pages 566–571, ISSN (Online) 2543-6376, DOI: https://doi.org/10.1515/astro-2017-0337.

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© 2017. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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