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Populations of Rydberg states of atoms in nebulae
Author(s) -
Gulyaev S.A.,
Nefedov S.A.
Publication year - 1991
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113120108
Subject(s) - physics , rydberg formula , planetary nebula , atomic physics , ionization , excited state , range (aeronautics) , hydrogen , ion , astrophysics , stars , materials science , quantum mechanics , composite material
Populations of highly‐excited states of hydrogen in gaseous nebulae are calculated including effects of lowering the atomic ionization potential. Factors b n and dln b n /d n were computed for a large range of temperature and densities. Collisions only between adjacent levels (Δ n = ±1) were included in the set of the statistical balance equations. Results predict the existence of a negative branch of the dln b n /d n curve. They have to be taken into account in calculating the nebulae models.