[mesa-users] Evolving a binary with a WD accretor

[Pablo Marchant]

Dear Erick, if you are not modelling the WD and just taking it as a point
mass, then the nature of that point mass is mainly decided by the mass
transfer efficiency. For this I recommend you check the options
mass_transfer_alpha, mass_transfer_beta, mass_transfer_gamma and
mass_transfer_delta, that allow you to fix fractions of transferred
material that are lost from the system in different ways, and transporting
varying amounts of angular momentum. To see the detail on how these options
(and all other options in MESA/binary) work, please refer to:

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

To understand what each option means physically, you can refer to, for
instance, Tauris & van den Heuvel 2006, section 16.4.1 (
http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:astro-ph/0303456). As a
starting point, you can use the binary_donor_only_implicit_mdot test_suite
case, and add the options I mentioned above in the "&binary_controls"
section of the inlist_project file.

On Mon, Feb 15, 2016 at 4:52 AM, Ruiz, Erick <erick.ruiz at ttu.edu> wrote:

> Hi,
>
>
> I am currently doing undergraduate research at my university. We are
> trying to investigate how the metallicity of the stars in a binary system
> affects the orbital period. However, I am having trouble setting the
> parameters. For example, I am trying to run a binary evolution for a CV
> with an initially detached ZAMS donor, evolving the donor star and not
> evolving the WD (essentially paragraph 7.4 in the 2011 paper, with varying
> metallicity). Like I said, the problem I am having is that I am not sure
> how to specify the stellar type (e.g. WD, NS, etc).
>
>
> I found an answer to a similar question (from 2013) mentioning
> 'implicit_rlo': https://sourceforge.net/p/mesa/mailman/message/30896796/
>
>
> However, I was not able to find 'implicit_rlo' or 'inlist_rlo' in the test
> suite.
>
>
> Thank you,
>
>
> Erick Ruiz
>
>
>
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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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