[Mesa-users] Problem with 20Msun star and z=0.005 : Fe-core is not producing ?

[Elena Ambrosi]

Dear Rubak,
I don't know if this can help, because what I am saying should depend on
the MESA release you are using.

I see from your inlist that you stated the inizial_z, but you did not load
the files containing the ZAMS model with that metallicity.

I mean that you should use the create_zams folder in the test suite, and
then, after  having created a file.data with that metallicity, write in
your inlist:

initial_z = 'your metallicity'
zams_filename = 'your_metallicity.data'

I hope this can help!

Cheers,

Elena


2018-06-11 10:08 GMT+02:00 Warrick Ball via Mesa-users <
mesa-users at lists.mesastar.org>:

> Hi Rupak,
>
> I'm not an expert in this area so can't help directly but you're more
> likely to get useful advice if you provide more information.  In
> particular, you've said the run "doesn't seem to progress from there". What
> does that mean?  What is the state of the stellar model when it stops
> "progressing"?  Does MESA stop?  If so, with what message?  Or do the
> timesteps decrease to small values?  How small?  What does the terminal
> output say the limiting factor is?  Have you looked at any relevant
> examples in the test_suite?
>
> At the very least, you should provide enough information to reproduce the
> "problem", which you haven't.  First, you haven't told us what version of
> MESA you're using.  Second, a quick glance at the inlist suggests it
> requires the initial model `20msun.mod`, which doesn't seem to be attached.
>
> I don't mean for you to necessarily answer each one of these questions but
> rather to serve as examples of the kinds of questions a stranger could ask
> to try to help diagnose the "problem".  Currently, your message basically
> says "this inlist doesn't do what I want/think it should, please help".
> When I ask for help on a forum, my rule of thumb is to expect readers to
> put in no more effort than is demonstrated by the content of my message to
> that forum.
>
> Cheers,
> Warrick
>
>
>
> On Mon, 11 Jun 2018, mesa-users at lists.mesastar.org wrote:
>
> Dear Mesa users,
>>
>> I am trying to run MESA with 20Msun, Vrot=200kms-1, and z=0.005 to
>> Fe-core infall >1000kms-1, without including any mass-loss, or
>> overshooting. However, the run goes up to Si-burning stage and doesn't seem
>> to progress from there. The Mesa inlist file is given below. Can you
>> please let me know why Fe-core is not producing ? Any suggestion, how to
>> proceed .....
>>
>> This is my inlist
>>
>> &star_job
>>
>>
>>
>> !LOAD from ZAMS model
>>
>>
>> load_saved_model = .true.
>>
>> saved_model_name = '20msun.mod'
>>
>>
>> set_initial_age = .true.
>>
>> initial_age = 0 ! in years
>>
>>
>> set_initial_model_number = .true.
>>
>> initial_model_number = 0
>>
>>
>> set_initial_dt = .true.
>>
>> years_for_initial_dt = 10
>>
>>
>>
>> ! rotation
>>
>>
>> change_rotation_flag = .true.
>>
>> new_rotation_flag = .true.
>>
>> new_surface_rotation_v = 200.0 ! km/sec
>>
>> set_surface_rotation_v = .true.
>>
>>
>> change_v_flag = .true.
>>
>> new_v_flag = .true.
>>
>> center_ye_limit_for_v_flag = 0.45d0
>>
>>
>> auto_extend_net = .true.
>>
>>
>> / ! end of star_job namelist
>>
>> !*----------------------------------------------------------
>> ------------------
>>
>>
>> &controls
>>
>>
>>
>>       initial_mass = 20
>>
>>
>> ! opacity
>>
>>
>>      initial_z = 0.005d0
>>
>>      use_Type2_opacities= .true.
>>
>>      Zbase = 0.005d0
>>
>>
>>
>> fe_core_infall_limit = 1.0d8
>>
>>
>>
>> Best regards
>> Rupak Roy
>>
>> --
>> ******************************************************************
>> * Rupak Roy
>> * Post Doctoral Fellow
>> * Inter-University Centre for Astronomy and Astrophysics
>> * Pune - 411007, India
>> * Mob: +91-7066564678
>> * E-mail : rupak at iucaa.in ; rupakroy1980 at gmail.com
>> *******************************************************************
>>
>>
>> _______________________________________________
> mesa-users at lists.mesastar.org
> https://lists.mesastar.org/mailman/listinfo/mesa-users
>
>
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