[mesa-users] create_zahb and relax

[Robert FARMER]

Test suite problems are allways a good place to start out, though you still
need to be careful you understand what all the parameters do. Some might be
set to speed the run up at the expense of precision. So as allways make
plots and see if you think the results are sensible.

I don't know for this case but you could experiment with different masses?
If its loading a model then you  need to look into the change mass (and the
change Z for your last question) parameters
http://mesa.sourceforge.net/star_job_defaults.html#modifications_to_model

There is also a pre_zahb test case that may solve your problems?

If its taking too long to run your own models you can allways get MESA to
save a mod file and then reload that yourself (like the test case loading
pre-zahb.mod file)

Rob



On Sat, Mar 28, 2015 at 7:16 AM, Cyrus Zalian <thebigkiwi2003 at yahoo.fr>
wrote:

> Hi to all mesa-users,
>
> As I already mentionned in a precedent question, I would like to study RR
> Lyrae stars using MESA.
>
> I've run several model from preMS to a core He limit of 10e-5 as suggested
> by Aaron.
>
> The problem is, that for the moment, it takes a rather long time (hours)
> to compute each model.
>
> So I had an idea : why not start from the create_zahb model in test_suite ?
>
> So all in all, here are my question
>
> 1) Is it a good idea ?
>
> 2) Is there a minimum/maximum masses for which the program will work ?
>
> 3) The program starts loads pre-zahb.mod model, but we don't have any
> information about this model ? How did we obtain it ? How can I have detail
> about this model ?
>
> 4) Linked to the last question : I want to study the influence of mass but
> also the influence of metallicity. This is why I need to know the initial
> value of Z. Now, if I want to use another value of Z, how should I do ? Has
> relax_Z anything to do with it ? Is it a good idea ?
>
> Thank you all in advance for your response.
>
>
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