Computer Science – Databases
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aipc..206...82r&link_type=abstract
Atomic processes in plasmas. AIP Conference Proceedings, Volume 206, pp. 82-91 (1990).
Computer Science
Databases
Stellar Atmospheres, Radiative Transfer, Opacity And Line Formation
Scientific paper
Persisting discrepancies between theory and observation in a number of astrophysical properties has led to the conjecture that opacity databases may be inaccurate. The OPAL opacity code has been developed to address this question. The physical basis of OPAL removes several of the approximations present in past calculations. For example, it utilizes a much larger and more detailed set of atomic data than was used to construct the los Alamos Astrophysical Library. This data is generated online, in LS or intermediate coupling, from prefitted analytic effective potentials and is of similar quality as single configuration, relativistic, self-consistent-field calculations. The OPAL code has been used to calculate opacities for the solar core and for Cepheid variable stars. In both cases, significant increases in the opacity compared to the Los Alamos Astrophysical Library were found.
Iglesias Carlo A.
Rogers Forrest J.
Wilson Brian G.
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