Astron. Astrophys. Suppl. Ser.
Volume 139, Number 2, October II 1999
|Page(s)||377 - 385|
|Published online||15 October 1999|
Stark broadening of the lower Rydberg , and lines of atomic hydrogen
Département de Physique, Faculté des Sciences, BP. 24157, Université de Douala, Cameroon
2 DAMAP and URA 812 du CNRS, Observatoire de Paris-Meudon, 92195 Meudon Cedex, France
Send offprint request to: O. Motapon
Accepted: 27 August 1998
This paper deals with the calculation of line widths and lineshapes of the lower Rydberg lines of atomic hydrogen () in the conditions of stellar envelopes and atmospheres - electron densities scaling from 109 to 1016 cm-3 and temperatures varying between 5000 and 40000 K. For these lines, the traditional semi-classical method breaks down, especially at low densities. Another or other theoretical approaches are needed for the determination of linewidths. An alternative tool is proposed in terms of collision rate methods. Data are provided for , and lines.
Key words: atomic data / line profiles / plasmas
© European Southern Observatory (ESO), 1999