Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..938..214m&link_type=abstract
SPECTRAL LINE SHAPES IN ASTROPHYSICS: VI Serbian Conference on Spectral Line Shapes in Astrophysics (VI SCSLSA). AIP Conference
Astronomy and Astrophysics
Astrophysics
Stellar Atmospheres, Radiative Transfer, Opacity And Line Formation, Normal Stars : General Or Individual, Atomic Processes And Interactions
Scientific paper
Using general stellar atmosphere code PHOENIX, the influence of chemi-ionization and inverse chemi-recombination processes, in H*(n)+H(1s) collisions, on the population of higher levels and consequently on profiles of Hydrogen lines in the atmospheres of late type (M) stars was studied. Obtained results are the first demonstration of the possibility to confirm the considered processes influence by direct observations of stellar spectra. It is demonstrated that it is very important to include chemi-ionization and chemi-recombination processes in modeling of atmospheres of late type stars, especially if one wants to use line profiles for diagnostics of stellar photospheres and lower chromospheres.
Allard France
Dimitrijevic Milan S.
Hauschildt Peter
Ignjatovic Ljubinko M.
Jevremovic Darko
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