[mesa-users] Binary capabilities on MESA

[Roni Waldman]

I thought wind mass loss would be negligible during RLOF.
What would you do, just add the wind and RLOF mass loss rates? Is that
justified?
Roni

On Tue, Oct 9, 2012 at 6:37 PM, Pablo Marchant <pamarca at gmail.com> wrote:

> 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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>>
>>
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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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