[mesa-users] "Opacity Calculations for Solar Mixtures": Mondet et al., 2015, ApJS 220, 2

[Warrick Ball]

Hi all,

I imagine that this paper is of interest to many on the mailing list. 
Please excuse me if this isn't regarded as appropriate!  I don't remember 
seeing it on arXiv, so if you don't follow the journals directly in some 
way, you may have missed it.

A table of opacities is given for AGS09 abundances in a relatively narrow 
range of parameters but they're chosen to cover the radiative part of the 
Sun.  Fig. 5 shows the comparison with OPAL tables.  There's a several per 
cent enhancement compared to OPAL.  (I had a quick look at Model S, and if 
I recalled the definition of R correctly, it's about -1.4.)


http://iopscience.iop.org/0067-0049/220/1/2

OPACITY CALCULATIONS FOR SOLAR MIXTURES
Guillaume Mondet, Christophe Blancard, Philippe Cossé, and Gérald 
Faussurier

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 10^20 and 10^26 cm^-3.  We discuss possible sources of 
uncertainty in the calculations. We also compare Rosseland opacities to 
OPAL and OP data.


Cheers,
Warrick


------------
Warrick Ball
Postdoc, Institut für Astrophysik Göttingen
wball at astro.physik.uni-goettingen.de
+49 (0) 551 39 5069