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Basics of the NLTE Physics

  • Kubát J
DOI: 10.1007/978-3-319-06956-2_14
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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.

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Kubát, J. (2014). Basics of the NLTE Physics (pp. 149–157). https://doi.org/10.1007/978-3-319-06956-2_14

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