Non-LTE treatment of Fe II in astrophysical plasmas.
Abstract
The authors describe their implementation of an extremely detailed model atom of singly ionized iron for NLTE computations in static and moving astrophysical plasmas. The model atom includes 617 levels, 13,675 primary permitted transitions and up to 1.2 million secondary transitions. The authors' approach guarantees that the total iron opacity is included at the correct wavelength with reasonable memory and CPU requirements. They find that the lines saturate the wavelength space, such that special wavelength points inserted along the detailed profile functions may be replaced with a statistical sampling method. The authors describe the results of various test calculations for novae and supernovae.
- Publication:
-
Journal of Quantitative Spectroscopy and Radiative Transfer
- Pub Date:
- December 1995
- DOI:
- 10.1016/0022-4073(95)00118-5
- arXiv:
- arXiv:astro-ph/9601148
- Bibcode:
- 1995JQSRT..54..987H
- Keywords:
-
- Radiative Transfer: Plasma;
- Radiative Transfer: Iron Lines;
- Radiative Transfer: Novae;
- Radiative Transfer: Supernovae;
- Astrophysics
- E-Print:
- 17 pages, latex, aip style, no figures included, full text with figures available at ftp://brian.la.asu.edu/pub/preprint/FeII-NLTE.ps.Z or at http://brian.la.asu.edu/