Re: [mesa-users] irradiation in binary_donor_only

[Pablo M. <pa...@gm...>]

Hi Thomas. Timesteps can be reduced due to convergence problems, or just
because the default timestep controls are too restrictive. Do you have an
idea what's the source of your timestep reduction? The terminal output
shows the source of timestep limits (check the last column of output,
second row. It often says varcontrol).

Cheers!

On Tue, Mar 3, 2015 at 3:58 PM, thomas c.d. (cdt1g11) <cd...@so...>
wrote:

>  Hi! im currently investigating the effects of irradiation on the
> evolution of binary systems, specifically starting with an accretor mass of
> 1.4M_sun and donor mass of 1.0_M_sun. using an initial period of 2.0 days
> one would expect angular momentum losses, roche lobe overflow and
> accretion.
>
>  I’m looking into the effects of x-rays, from this accretion, on the
> donor star. To do this i am using the binary_donor_only module in the
> binary suite. when setting in the project inlist
> accretion_powered_irradiation = .true. we see some effects of
> irradiation. however when we then use different values of
> col_depth_for_eps_extra we encounter a problem for any value <1.
> specifically, as mass loss begins the time step reduces to a size so small
> it’s impractical for running the code; 1 test saw 750,000 models calculated
> without progressing a single year in age.
>
>  Does anyone have any wisdom for solving this issue? would be greatly
> appreciated!
> thanks!
>
>  Callum Thomas
>
>
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-- 
Pablo Marchant Campos
M.Sc on Astrophysics, Universidad Católica de Chile
PhD student, Argelander-Institut für Astronomie