Line profiles of H-like ions of C, N, and O in stellar plasmas
J.-F. Gonzalez 1,
C. Stehlé 2,
M.-C. Artru 1 and
G. Massacrier 1
Received 1 September 1997 / Accepted 29 September 1997
Theoretical Stark profiles of Balmer and Lyman series of H-like ions of carbon, nitrogen, and oxygen are presented for a range of plasma conditions where these ions are dominant within their species. A convenient parametric formula is derived to fit the theoretical profiles, depending only on electronic density and the principal quantum number of the upper level of the transition. This analytic expression makes it easy to introduce these new profiles in many astrophysical applications.
The effect of including these profiles in the calculation of radiative acceleration () following the method developed in an earlier paper is presented. The contributions of bound-bound (b-b) transitions of H-like ions to is found to be smaller than previously computed, giving more importance to bound-free (b-f) and free-free (f-f) contributions.
Key words: atomic processes diffusion line: profiles radiative transfer stars: atmospheres
Present address: European Southern Observatory, Casilla 19001, Santiago 19, Chile
Send offprint requests to: M.-C. Artru
© European Southern Observatory (ESO) 1998
Online publication: January 27, 1998