[mesa-users] White Dwarf Mass Gain

[Bill Paxton]

Hi Eric,

To get you started, try running star/test_suite/wd_ignite with this slightly edited inlist (it turns on PGstar so you can watch it).
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The accretion is 1e-9 Msun/year, and the ignition is "hot" and at the center.
If you want to do cold ignition with pycno rates, we'll need to do some work to get those working.

Good luck!

-Bill







On Jun 29, 2011, at 10:06 AM, Pierre Lesaffre wrote:

> 
>  Dear Eric,
> 
>  I would start by accreting C and O on a pure C/O white dwarf. This to 
> avoid any complications at the surface. Even then you will probably get 
> trouble evolving the growing convective core as the C burning luminosity 
> increases. But I have not yet tried it myself with Mesa... so
>  good luck !
> 
> Pierre.
> 
> On Wed, 29 Jun 
> 2011, Eric Blaney wrote:
> 
>> Dear Mesa-Users,
>> 
>> I have recently been attempting to use MESA to model accreted mass onto a White 
>> Dwarf until it reaches it's chandresekar mass limit.  I'm simply wondering if it 
>> is even possible, or if anyone has done this before using MESA and would share 
>> any tips on how to successfully do so. 
>> 
>> 
>> When I add mass onto White Dwarfs, it seems that that star becomes unstable once 
>> hydrogen burning begins--reducing the timestep to mere minutes and the mass gain 
>> rate jumps back and forth from, my normal input value, 10^-8 SolarMass/yr and 
>> 10^-99.  If anyone has any idea how to fix these problems, if there even is a 
>> solution, it would be greatly appreciated.
>> 
>> Much thanks,
>> 
>> Eric
>> 
> 
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