Low temperature Rosseland opacities (Lederer+, 2009)

Details Low temperature Rosseland opacities (Lederer+, 2009) Low temperature Rosseland opacities (Lederer+, 2009)

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ycat..34940403l&link_type=abstract

VizieR On-line Data Catalog: J/A+A/494/403. Originally published in: 2009A&A...494..403L

Physics

Atomic Physics

Atomic Physics, Models: Atmosphere, Opacities, Abundances

Scientific paper

The database of Rosseland opacities consists of 14 files (kR_Z?E-?.dat), one for each metallicity. The available values of the metallicity are listed in the file kRZfCN.dat together with the respective enhancement factors for 12C and 14N. This file contains information equivalent to Table 3 from the paper. The data files consist of a header indicating the abundances used (Lodders, 2003ApJ...591.1220), the initial metallicity, the initial mass fractions for 12C, 14N and the alpha elements, and a look-up table for the actual data block. This block is made up of 63 rectangular data arrays where the logarithm of the Rosseland opacity (log{kappa}R [cm2/g]) is tabulated as a function of the logarithm of the gas temperature (logT [K]) and the logarithm of R (logR [g/cm3/K31018] with R={rho}/(T6)3 and T6=T/(106K)). The ranges covered are 3.2<=logT<=4.05 with a step size of 0.05, and -7.0<=logR<=1.0 with a step size of 0.5. The 63 tables result from the variation of the hydrogen mass fraction (X=0.5,0.7,0.8), and the mass fractions X(12C) [7 different values] and X(14N) [3 different values]. The tables are ordered such that the mass fraction X(12C) varies fastest followed by the hydrogen mass fraction and X(14N). The original files are available in files subdirectory. For future compatibility a data field for the alpha element enhancement factor was introduced in the look-up table.
(4 data files).

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