[mesa-users] make naked WD models

[chenhl]

Dear Philip,

Thanks for your help!

Actually I want a naked WD with an evolutionary composition profile.
I will try if I can make it with relax_initial_composition.


Best wishes,
Hailiang


On Thu, Sep 29, 2016 at 12:26 PM, Philip D. Hall <pdhall99 at gmail.com> wrote:

> Dear Hailiang,
>
> I have used two methods to make naked WDs with uniform composition.
>
> 1. Evolve a pre-MS star of the desired composition with nuclear burning
> switched off until it becomes a WD. The attached
> inlist_make_co_wd_from_prems achieves this with r8845. The pre_ms_T_c
> parameter may need to be tweaked.
>
> 2. Make a WD with an envelope (as in make_co_wd) then change the
> composition using set_uniform_initial_xa_from_file = .true. or similar.
>
> If you want a naked WD with an evolutionary composition (and thermal)
> profile then maybe relax_initial_composition could be an alternative to
> mass-loss, but I have no experience of how well it works for this problem.
>
> Philip D. Hall
> Armagh Observatory
>
>
> On 29 September 2016 at 10:08, chenhl <chlcrazyboy at gmail.com> wrote:
>
>> Dear all,
>>
>> I used star/test_suite/make_co_wd and star/test_suite/make_o_ne_wd to
>> make CO and ONe WD models.  Normally, the CO or ONe WDs produced with these
>> test suite cases are surrounded by a zone of unburnt material (i.e. He-rich
>> or CO-rich material, respectively).  But I want to make 'pure' WD models,
>> which do not have such unburnt material.  I have tried to adjust the
>> initial mass and wind efficiency. But I still failed to make it. Is there
>> anyone have experience on this?
>>
>>
>> Best wishes,
>> Hailiang
>>
>>
>>
>>
>>
>> ------------------------------------------------------------
>> ------------------
>>
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>>
>>
>
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