Line profiles of H-like ions of C, N, and O in stellar plasmas

Details Line profiles of H-like ions of C, N, and O in stellar plasmas Line profiles of H-like ions of C, N, and O in stellar plasmas

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...330.1120g&link_type=abstract

Astronomy and Astrophysics, v.330, p.1120-1126 (1998)

Astronomy and Astrophysics

Astrophysics

2

Atomic Processes, Diffusion, Line: Profiles, Radiative Transfer, Stars: Atmospheres

Scientific paper

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 (g_rad) following the method developed in an earlier paper is presented. The contributions of bound-bound (b-b) transitions of H-like ions to g_rad is found to be smaller than previously computed, giving more importance to bound-free (b-f) and free-free (f-f) contributions.

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