[Mesa-users] Problem with mass transfer rate for massive donors accreting onto a BH.

[Francis Timmes]

have you tried reducing the timestep?

http://mesa.sourceforge.net/binary_controls_defaults.html#timestep_controls

fxt





> On Apr 27, 2018, at 7:27 AM, Elena Ambrosi via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> 
> Dear MESA users, 
> 
> I am running some binary systems with a massive donor and a massive BH. I am using the MESA version 10108.
> 
> I gave a look at some inlists from the summer schools page and adapted them for my purpose (i.e. Marchant 2017, De Mink 2017, Phinney 2015).
> The runs seem to perform well for  donor masses up to 12 Msol.
> 
> For higher donor masses, in the range 15-25 Msol, the evolution of the mass transfer is not smooth at the end of the case A mass transfer phase.
> 
> Moreover, the more massive the donor, the more enhanced this effect is. 
> Changing 'varcontrol_target_case_a' and 'varcontrol_target_case_b''  diminishes the oscillation in the mass transfer, but the problem persists.
> 
> 
> Can someone please help me to understand if something important is missing in my inlists ot if this is the expected behaviour for a massive donor star?
> Enclosed, please find the inlists relative to one of the aforementioned runs and a plot describing the problem.
> 
> Thank you in advance,
> 
> Elena
> 
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