Populations of the Discrete Levels of Hydrogen in Nonstationary Cooling Gases
| Autor: | O. M. Belova, K. V. Bychkov |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Hydrogen 010308 nuclear & particles physics chemistry.chemical_element Astronomy and Astrophysics Giant star 01 natural sciences Atmosphere Thermalisation chemistry Excited state 0103 physical sciences Principal quantum number Electron temperature Atomic physics Ground state 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | Astrophysics. 60:358-364 |
| ISSN: | 1573-8191 0571-7256 |
| DOI: | 10.1007/s10511-017-9489-2 |
| Popis: | We study the emission from a gas heated in a shock front in the atmosphere of a giant star and examine the deviation of the populations of the discrete levels of hydrogen from their quasiequilibrium values according to the Saha formula as functions of the instantaneous electron temperature Te(t) and density Ne(t). Special attention is devoted to highly excited states. The deviations are found to decrease with increasing principal quantum number. They reach a maximum during the phase in which the electron temperature is rising and then fall off monotonically. The highest levels thermalize first, then the less excited states, and finally the ground state. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|