Volume 403, Number 3, June I 2003
|Page(s)||787 - 791|
|Published online||23 May 2003|
Influence of chemi-ionization and chemi-recombination processes on the population of hydrogen Rydberg states in atmospheres of late type dwarfs
Institute of Physics, PO Box 57, 11001 Belgrade, Serbia and Montenegro
2 Institute Isaac Newton of Chile, Yugoslavia Branch, Belgrade, Serbia and Montenegro
3 APS Division, Phys. Depart., Queen's University Belfast, BT7 1NN, Northern Ireland, UK
4 Astronomical Observatory, Volgina 7, 11160 Belgrade, Serbia and Montenegro
5 Depart. of Phys. and Astronomy and Center for Simulat. Physics, University of Georgia, Athens, GA 30602, USA
6 Hamburger Sternwarte, Universitaet Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany
7 CRAL/ENS, 46 Allée d'Italie, 69634 Lyon Cedex 07, France
Corresponding author: M. S. Dimitrijević, email@example.com
Accepted: 4 February 2003
We study the influence of a group of chemi-ionization and chemi-recombination processes on the populations of higher states of hydrogen in the layers of a stellar atmosphere. The group of processes includes ionization: , , and inverse recombination: , , where is the hydrogen atom in a state with the principal quantum number , and is the hydrogen molecular ion in a weakly bound rho-vibrational state of the ground state. These processes have been treated within the framework of the semi-classical approximation, developed in several previous papers, and have been included in the general stellar atmosphere code phoenix. We present results for an M dwarf atmosphere with = 3800 K and find that the inclusion of chemi-ionization and chemi-recombination processes is significant in the low temperature parts of the atmosphere.
Key words: atomic processes / molecular processes / stars: late type
© ESO, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.