[mesa-users] Binary capabilities on MESA

[Pablo Marchant]

Roni, nice find. However, why would you justify ignoring mass loss due to
winds during mass transfer? I don't really think there's a physical
justification to do so (and as far as I know they can play an important
role during RLOF), nor a technical advantage to it.

Cheers!

On Tue, Oct 9, 2012 at 5:55 PM, Roni Waldman <roni181066 at gmail.com> wrote:

> Hi Bill,
> Great. I hope you can do this soon.
> When you do that, I suggest another fix:
> If you set wind mass loss for the primary, it does not do roche lobe mass
> transfer.
> I think both stars should lose mass according to the wind prescription
> when there is no roche lobe overflow, and when there is - the wind for both
> stars should be switched off and mass transfer should be switched on.
> Thanks,
> Roni
>
>
> On Tue, Oct 9, 2012 at 5:44 PM, Bill Paxton <paxton at kitp.ucsb.edu> wrote:
>
>> Hi Roni,
>>
>> Good catch -- that's a bug.   The code is correctly updating the
>> "companion_mass" variable,
>> but it isn't actually causing the model for the companion to gain mass
>> accordingly:
>> we calculate what the mass change should be, but we don't make it happen.
>>
>> I'll add this to the list -- hopefully there will be a fix soon.
>>
>> -Bill
>>
>>
>>
>>
>>
>>
>>
>> On Oct 9, 2012, at 6:49 AM, Roni Waldman wrote:
>>
>> > Hi,
>> > Following up on a recent discussion here, I started looking at binary
>> evolution with MESA.
>> > I ran the binary_rlo_implicit example.
>> > I got results looking the same as documented on the mesa forum, however
>> something looks peculiar:
>> > Whereas the companion mass, as plotted from the history.data of the
>> primary is growing in mass, as it should, in the log2 and out file it loses
>> mass, according to the mass loss laws set in the inlist2.
>> > Can anyone explain what is going on?
>> > Cheers,
>> > Roni
>> >
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-- 
Pablo Marchant Campos
M.Sc on Astrophysics, Universidad Católica de Chile
PhD student, Argelander-Institut für Astronomie
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