[mesa-users] Decoupling opacities and metallicity

[Pablo Marchant]

Hi Ylva. A simple way to do that experiment is to use type2 opacities
fixing Zbase to a lower metallicity than your model actually has. The
difference between Zbase and the actual Z will be interpreted as CO
enhancement, so its not exactly the same as using the lower metallicity
tables though, but it should behave close to that. To force the model to
strictly use lower metallicity tables, you can use use_other_kap to call
the standard opacity routines but fixing the metallicity.

Can you share why you want to do this?

On Thu, Jun 30, 2016 at 10:32 AM, Ylva Götberg <y.l.l.gotberg at uva.nl> wrote:

> Hi all!
>
> For testing purposes, I am trying to use the opacity tables for a low
> metallicity model in the high metallicity counterpart. I have been
> experimenting with the inlist settings, but find that these provide only a
> simpler approach where the opacity can be decreased by a factor or limited
> to a highest value for example. Now I am searching through the mesa/kap
> module, but cannot seem to find the place where this is set. Do you have
> any idea of how to redirect a high metallicity run to use the opacity of
> the corresponding model with low metallicity?
>
> Hoping my question was clear,
>
> Thanks in advance!
> Ylva (PhD in Amsterdam)
>
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-- 
Pablo Marchant Campos
M.Sc on Astrophysics, Universidad Católica de Chile
PhD student, Argelander-Institut für Astronomie
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