Comparisons and Comments on Electron and Ion Impact Profiles of Spectral Lines

Baltic astronomy

article

Sylvie Sahal-Bréchot¹  Milan S. Dimitrijević²  Nebil Ben Nessib⁴ 

[1] Paris Observatory, LERMA CNRS UMR;Astronomical Observatory;Paris Observatory, LERMA CNRS UMR 8112, UPMC;National Institute of Applied Sciences and Technology, University of Carthage

关键词: atomic data;    atomic processes;    line;    profiles;    astronomical databases;   

DOI  :  10.1515/astro-2017-0331

来源: Institute of Theoretical Physics and Astronomy

【 摘 要 】

Stark broadening theory is currently operated for calculating widths and shifts of spectral lines that are needed for spectroscopic diagnostics and modeling in astrophysics, laboratory and technological plasmas. We have calculated a great number of data, obtained through the impact semiclassical perturbation theory: tables have been published for neutral atom and ion emitters, and typical temperatures, electron and ion densities. They are currently implemented in the STARK-B database which participates in the European effort within the Virtual Atomic and Molecular Data Centre. Despite of that, a great number of data are still missing. In the present paper, we revisit and compare a great number of the impact Stark widths and shifts by considering their semiclassical perturbation expressions. We also provide fitting formulae which are essential for the modeling codes of stellar atmospheres and envelopes.

【 授权许可】

Unknown