J/ApJS/220/2 Rosseland opacities with the OPAS model (Mondet+, 2015)
Opacity calculations for solar mixtures.
Mondet G., Blancard C., Cosse P., Faussurier G.
<Astrophys. J. Suppl. Ser., 220, 2 (2015)>
=2015ApJS..220....2M 2015ApJS..220....2M (SIMBAD/NED BibCode)
ADC_Keywords: Sun ; Models
Keywords: opacity; Sun: interior
Abstract:
The OPAS opacity model has been used to calculate the radiative
opacity of stellar plasmas in local thermodynamic equilibrium.
According to the recent chemical composition revision of the solar
photosphere, opacities have been computed for various hydrogen and
metallic element mass fractions. Calculations have been performed
toward solar interior modeling for temperatures between log[T(K)]=6
and log[T(K)]=7.2, and for electron densities between 1020 and
1026cm-3. We discuss possible sources of uncertainty in the
calculations. We also compare Rosseland opacities to OPAL and OP data.
Description:
The OPAS opacity model has recently been used to calculate the solar
opacities along a specific thermodynamical path (Blancard et al.
2012ApJ...745...10B 2012ApJ...745...10B). In the present work, we used this model to
produce opacity tables that are useful for solar radiative zone
modeling.
The Rosseland opacities that we obtained are compared to Opacity
Project (OP) (http://cdsweb.u-strasbg.fr/topbase/topbase.html) and
OPAL (http://opalopacity.llnl.gov/) data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 38 30870 OPAS Rosseland opacities
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See also:
VI/89 : Radiative forces for stellar envelopes (Seaton, 1997)
VI/80 : Opacities from the Opacity Project (Seaton+, 1995)
J/A+A/572/A69 : Opacities of magnetized neutron stars (Potekhin+, 2014)
J/ApJS/214/25 : Rosseland + Planck gaseous mean opacities (Freedman+, 2014)
J/A+A/494/403 : Low temperature Rosseland opacities (Lederer+, 2009)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [table_]
7- 8 I2 --- T [1/30] Label for a fixed (X,Z)
composition (1)
10- 13 F4.2 --- X [0/0.8] Hydrogen mass fraction
15- 19 F5.3 --- Z [0.01/0.02] Metallic element mass fraction
21- 25 F5.3 [K] log(T) [6/7.2] Logarithm of temperature
27- 31 F5.2 [g/cm3/MK3] log(R) [-2/-1] Logarithm of density
per cubic temp. (2)
33- 38 F6.3 [cm2/g] log(kR) [-0.3/2.1] Logarithm of Rosseland
mean opacity
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Note (1): Fixed metal distribution based on
Asplund, Grevesse, Sauval, and Scott (2009ARA&A..47..481A 2009ARA&A..47..481A);
From table_01 with X=0 and Z=0.01 to table_30 with X=0.8 and Z=0.02.
Note (2): log(R)=log(density)-3.*log(T)+18
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 26-Oct-2015