[Mesa-users] Orphaned binary history column?

[Pablo Marchant]

Dear Alison, this is indeed an option that was removed, and the
corresponding lines need to be cleaned from the defaults file. Mostly this
was done because the option was unused, and as it was the single special
case option in the binary_history.defaults file (ie, not requiring just a
name of the quantity but additional info, in this case the particular
species) it allowed some simplification to the code.

For reference, the option was available on version 10000, you can see it
here at the beginning of the binary_history_getval subroutine:
https://mesa.assembla.com/spaces/mesa/subversion/source/10000/trunk/binary/private/binary_history.f90
in coding it by yourself, you might want to use the xa_removed value of
star_info as was done here. This is to ensure you use the composition of
layers removed from the star, instead of using the surface composition at
the end/start of a step, which can cause small discrepancies.

Cheers

On Mon, Oct 19, 2020 at 5:32 PM Alison Sills via Mesa-users <
mesa-users at lists.mesastar.org> wrote:

> Hi,
>
> I'm using MESA to look at yields from binary evolution. In version
> r12778, there's a binary history column in the defaults that looks useful:
>
>        !lg_mdot_system h1 ! you can use lg_mdot_system <isotope> to get
> the mass loss
>                           ! rate from the system corresponding to a
> particular isotope.
>
> However, when I try to uncomment this and use it, I get "Unknown
> binary_history_columns.list column" and sure enough, there is no mention
> of lg_mdot_system in any of the source code that I can find.
>
> Was this something that existed in an older version of MESA and how can
> I find out which version?
>
> I was prepared to write my own routine, and I can still do that of
> course, but if the code already exists...
>
> Cheers,
>
> alison
>
> --
> Alison Sills
> Professor, Physics & Astronomy
>
> _______________________________________________
> mesa-users at lists.mesastar.org
> https://lists.mesastar.org/mailman/listinfo/mesa-users
>
>

-- 
Pablo Marchant Campos
M.Sc on Astrophysics, Universidad Católica de Chile
PhD on Astrophysics, Argelander-Institut für Astronomie, Universität Bonn
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