[mesa-users] Create a helium star

[Ehsan Moravveji]

Hello Hailang,
Bill has already implemented a remedy for that. In your
mesa/star/defaults/star_job.defaults, you find the following entries that
you may like to initiate as:
      change_initial_Y = .true.
      new_Y = 0.98
      change_initial_Z = .true.
      new_Z = 0.02
and do not forget to set
   create_pre_main_sequence_model = .true.
as your desired composition may not be already defined therein. So, you
are evolving your customized star from its early evolution step starting
with the triple alpha reaction. I have not tried such before. In case you
have problem with convergence at the early steps, play around with
      pre_ms_T_c = 3e5 ! initial center temperature (below 1d6)

I hope this helps.

Ehsan.


> Hi,
>
> Is there anyone who can tell me how to create a helium star with Y=0.98,
> Z=0.02?
> Thank you in advance!
>
> Best wishes,
>
> Hailiang
>
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