[Mesa-users] A Query regarding swithcing off magnetic braking

Pulkit Ojha pulkit.ojha at niser.ac.in
Sun Jul 9 06:15:59 UTC 2023


Dear All,

I'm evolving LMXB models with NS accretors with the specifications
described in the attached inlist_project file. There is this option of
"keep_mb_on" for calculating the angular momentum loss due to magnetic
braking. It decides whether to switch off magnetic braking when the star
becomes fully convective. If we choose to switch it off, models are running
fine (stopping after 5-8k timesteps) but if case we do not switch it off
i.e. "keep_mb_on = .true." , evolution isn't stopping at all. After running
for 12-13k steps, the mass transfer rate as well as the masses of both the
stars become constant but the steps are just repeating themselves, even
till 40k steps.

Can anyone help me to understand what's going on there? Is the software
getting stuck in some loop or the values of mass transfer become so low
that they do not appear changing?
Please find attached the inlist and extras files.

-- 
Pulkit Ojha
5th Year Integrated MSc.,
School of Physical Sciences,
National Institute of Science Education and Research
<https://www.niser.ac.in/>
Bhubaneswar, INDIA
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20230709/dd5c40aa/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: inlist_project
Type: application/octet-stream
Size: 1401 bytes
Desc: not available
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20230709/dd5c40aa/attachment.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: run_binary_extras.f90
Type: text/x-fortran
Size: 29140 bytes
Desc: not available
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20230709/dd5c40aa/attachment.bin>


More information about the Mesa-users mailing list