[Mesa-users] Evolution of a 9M_sun ZAMS star up to to core collapse

[Bill Paxton]

just a quick comment:  i’ve never been able to get 9M beyond the off-center Neon flash.  Perhaps i’m just too impatient, but it takes longer than I’m willing to wait for the burning to make its way slowly to the center.  with more massive models, the neon ignition is at the center so things go smoothly.   you are welcome to try, but it might go easier if you can redefine your problem to 12M or more.

cheers,
bill


> On Apr 3, 2021, at 10:12 AM, Amar Aryan via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> 
> Dear MESA user team,
>  
> I am trying to make a 9M_sun ZAMS model with Z=0.02 that explodes as a type IIb SN. Gladly, I could evolve the star up to the stage of Fe core infall, using the default star/test_suit/example_make_pre_ccsn with few modifications. Although I could evolve the model up to Fe core infall, I am not sure about a few parameters to be physical :
> 
> Now here I briefly mention the changes in the inlist_files of example_make_pre_ccsn directory :
> 
> a) In inlist_common, varcontrol_target = 1d-3,
>                            mixing_length_alpha = 2.0
>             mixing_delta_coeff_for_highT = 2.5
>                                                               f = 0.007    (Not sure if this is allowed!)
>                                                              f0= 0.001
> 
> b) In  inlist_set_alpha_mlt, x_ctrl(21) = 2.5
>                                            x_ctrl(22) = 1.5
>                                            x_ctrl(23) = 0.5
>         
> 1) In Inlist_to_zams, varcontrol_target = 1d-5   
> 
> 2) In inlist_to_zams, varcontrol_target = 1d-5
> 
> 3) In inlist_remove, varcontrol_target = 1d-5, 
>                                      mass_change = -1d-4
>                      star_H_mass_min_limit = 0.013
> 
> 4) In inlist_before_remove,  ! varcontrol_target = 1d-2   (Not used)
>                      Steps_to_take_before_terminate = 2
> 
> 5) In inlist_to_si_burn, varcontrol_target = 5d-4,
>                               mixing_length_alpha = 0.01 (seems to be too low but anything greater than 0.01 did not worked, setting this to 0 also failed!!)
> 6) In inlist_to_lgT9.9, varcontrol_target = 5d-4 
> 
> Please provide your valuable suggestions regarding f, f0, mixing_lenth_alpha, and other major mistakes if any in the above parameters.
> 
> With best regards,
> Amar
> 
> 
> 
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