[Mesa-users] The nuclear burning after log T = 9.85 is stop ?

[Francis Timmes]

> ... nuclear burning in the outer shell seems to stopped.

inlist_finish turns off nuclear reactions for this dynamical phase of evolution:

      eps_nuc_factor = 0d0
      dxdt_nuc_factor = 0d0

https://docs.mesastar.org/en/release-r22.05.1/reference/controls.html#eps-nuc-factor
https://docs.mesastar.org/en/release-r22.05.1/reference/controls.html#dxdt-nuc-factor

fxt




> On Sep 13, 2022, at 8:04 PM, 辛文宇 via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> 
> Hi, 
> 
> 
> 
> I am using  a example '25M_pre_ms_to_core_collapse' in test_suite of MESA 12778
> 
> to evolve a star form ZAMS to Fe core collapse.
> 
> Some of the inlist files are attached. The following three header files are used successively.
> 
> inlist_to_lgT_9.9_header
> 
> inlist_convert_header
> 
> inlist_finish_header
> 
> When log T_c reaches 9.85, the 'inlist_to_lgT_9.9_header' is finished and 
> 
> the 'inlist_convert_header' is continue. This file seems evolve the models forwards 100 steps.
> 
> Then the file 'inlist_finish_header' will finish the folloing evolution until the log Rho_c reaches
> 
> 10.4 g cm^-3. However, in this part, the logT and logRho increases, but the nuclear burning
> 
> in the outer shell seems to stopped. I am sure why. 
> 
> Here also attached a Kippenhahn diagram for M = 28 Msun. 
> 
> When logT_c =9.85, log t_final - t = -5, at the end of the calculation log t_final - t = -8.
> 
> It seems that from the center  to M_r=8 Msun, all the nuclear burning is stopped.
> 
> I also checked the energy generation rate of C, O and Si burning in the profileXX.data
> 
> they are 0 in this stage.
> 
> 
> 
> Thanks,
> 
> Wenyu Xin
> 
> <inlist.zip><28M_kipp.pdf>_______________________________________________
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