Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (519) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
· Translate This Page
Spin-orbit interaction effects on the Rosseland mean opacity
Iglesias, Carlos A.; Rogers, Forrest J.; Wilson, Brian G.
AA(Lawrence Livermore National Lab., CA), AB(Lawrence Livermore National Lab., CA), AC(Lawrence Livermore National Lab., CA)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 397, no. 2, p. 717-728. (ApJ Homepage)
Publication Date:
Atomic and Molecular Physics
NASA/STI Keywords:
Opacity, Spin-Orbit Interactions, Stellar Composition, Stellar Interiors, Stellar Models, Absorption Spectra, Abundance, Emission Spectra, Metallicity
Bibliographic Code:


Recently published opacity tables for astrophysical mixtures using the OPAL code showed significant differences when compared to the commonly used Los Alamos results. An important finding of the OPAL calculations was a large opacity enhancement in the few hundred-thousand degree temperature range. This new opacity bump is a consequence of improvements in the atomic data generation. Specifically, the configuration term splitting in OPAL was done in the pure LS-coupling approximation which is essentially neglected in the Los Alamos calculations. However, for heavier elements such as Fe, spin-orbit interactions are small but not negligible; consequently, pure LS-coupling breaks down. The main impact of the spin-orbit interaction is to enhance significantly the opacity in the region of the Z bump but only at low densities. New Rosseland mean opacity tables with intermediate coupling for the Fe have been tabulated. Although a metal composition based on recent analysis of solar observations is assumed as standard, opacity tables for mixtures with different relative metal abundances are possible. In addition, the previous tables are extended to lower and higher densities as well as higher metallicity.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences

More Article Retrieval Options

HELP for Article Retrieval

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

Find Similar Abstracts:

Use: Authors
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
arXiv e-prints