[mesa-users] Opacity Type I in the envelope and Type II in the core

[Aaron Dotter]

Hi Ehsan,

A few minutes with grep will answer your questions, I promise.
 frac_Type1/2 is determined internally in the kap module, though you can
expose it in the profiles if you like, as explained in controls.defaults.
It's a good idea to use the profile output to confirm that you're getting
what you want.

Aaron

On Wed, Jul 22, 2015 at 8:24 PM, Ehsan Moravveji <e.moravveji at gmail.com>
wrote:

> Dear mesa users,
> As you know, the OP Type I tables are limited to logT<=8.0, whereas OPAL
> Type I and CO-enhanced Type II extend to logT<=8.7; therefore, it one can
> only use the OPAL tables for after core He burning anyway.
>
> I would like to blend the two sets of opacity tables, so that after the
> TAMS, the OP Type I tables are used in the envelope, and the OPAL Type II
> tables are used near the core, anywhere temperature drops below say
> logT<7.60.
> I only wanted to double check with you if the following star_job and
> controls settings do this for me. They are trimmed from the full inlist:
>
> &star_job
>       kappa_type2_logT_lower_bdy = 7.60d0
> /
>
> &controls
>     cubic_interpolation_in_Z = .true.
>     use_Type2_opacities = .true.
>     Zbase = 0.02
>     kap_Type2_full_off_X = 1d-6
>     kap_Type2_full_on_X = 1d-6
> /
>
> Moreover, in controls.defaults, there is a mention of possibly blending
> Type I and Type II tables giving the blend weight “frac_Type2”, but this
> variable is not made publicly available in the controls inlist.
> For my purpose, do I also need to use frac_Type2?
>
> Best regards
> Ehsan.
>
>
>
>
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