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Galaxies 2018, 6(3), 72;

The Collisional Atomic Processes of Rydberg Hydrogen and Helium Atoms: Astrophysical Relevance

Institute of Physics, Belgrade University, Pregrevica 118, 11080 Zemun, Belgrade, Serbia
Astronomical Observatory, Volgina 7, 11060 Belgrade, Serbia
LERMA, Observatoire de Paris, UMR CNRS 8112, UPMC, 92195 Meudon CEDEX, France
Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
Author to whom correspondence should be addressed.
Received: 17 June 2018 / Revised: 6 July 2018 / Accepted: 12 July 2018 / Published: 16 July 2018
(This article belongs to the Special Issue Atomic and Molecular Data Needs for Astronomy and Astrophysics)
PDF [548 KB, uploaded 20 September 2018]


Elementary processes in astrophysical environments traditionally attract researchers’ attention. We present the data needed for the inclusion of the specific atomic collisional processes in the investigation of the optical and kinetic properties of weakly ionized stellar atmosphere layers. The first type of processes are collisional ionisation (chemi-ionization) processes, and the second ones are excitation and de-excitation (i.e., ( n - n )-mixing processes). We give the rate coefficients of the aforementioned processes for the conditions that exist in the solar photosphere, the atmosphere of DB white dwarfs, M-type red dwarfs, etc. View Full-Text
Keywords: atomic data; molecular data; atomic and molecular databases atomic data; molecular data; atomic and molecular databases

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Srećković, V.A.; Dimitrijević, M.S.; Ignjatović, L.M.; Bezuglov, N.N.; Klyucharev, A.N. The Collisional Atomic Processes of Rydberg Hydrogen and Helium Atoms: Astrophysical Relevance. Galaxies 2018, 6, 72.

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