Basics of the NLTE physics
Solar and Stellar Astrophysics
2016-07-27 v1 Atomic Physics
Abstract
Basic assumptions of the NLTE approximation in stellar atmospheres are summarized. The assumptions of thermodynamic equilibrium, local thermodynamic equilibrium (LTE), and non-LTE (NLTE) are compared. It is emphasized that LTE is a poor approximation if radiative transitions dominate in stellar atmospheres. The equations of kinetic equilibrium and methods of their solution are discussed.
Keywords
Cite
@article{arxiv.1406.3553,
title = {Basics of the NLTE physics},
author = {Jiří Kubát},
journal= {arXiv preprint arXiv:1406.3553},
year = {2016}
}
Comments
in Determination of Atmospheric Parameters of B-, A-, F- and G-Type Stars, E. Niemczura et al. eds., Springer, in press