[mesa-users] Asplund abundances in MESA -- which ones?

Richard Townsend townsend at astro.wisc.edu
Wed Apr 15 09:20:51 EDT 2015

Thanks, Jieun!

Comparing the data in chem_def.f90 against Table 1 of Asplund+09, it looks like the meteoritic values for As, Se and Br are used in the file because the photosphere values are missing.

However, that doesn’t explain why the meteoritic value for Li is used, rather than the photosphere value. Does anyone have any ideas?



> On Apr 14, 2015, at 9:52 PM, Choi, Jieun <jieun.choi at cfa.harvard.edu> wrote:
> Hi Rich,
> Comparing Table 1 in Asplund+09 and the log abundances listed in init_AGSS09_data, it looks like MESA's using present-day photosphere values with a few exceptions, e.g., Li, Br.
> Cheers,
> Jieun
> On Tue, Apr 14, 2015 at 9:37 PM, Richard Townsend <townsend at astro.wisc.edu <mailto:townsend at astro.wisc.edu>> wrote:
> Hi folks —
> In chem/chem_def.f90, the ‘AGSS09' abundances are referenced as coming from Asplund, Grevesse, Sauval, and Scott 2009 (Annu. Rev. Astron. Astrophys. 2009. 47:481–522). But Asplund et al give values for both solar and proto-solar abundances. Which is MESA using?
> cheers,
> Rich
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