[Mesa-users] How do you change timestep in MESA?

[Warrick Ball]

Hi Bea,

> 1. What does this error mean?

As Frank has already said, that error message is a general symptom of MESA failing to compute a star's evolution.  It can happen for many reasons, which we can't guess without more input, and it usually isn't solved by decreasing the minimum timestep.

> 2. Where is the timestep adjusted? Where do you add the timestep value: &star_job or &controls?

In a bid to help you help yourself a bit, did you try searching (e.g. for "timestep") in the defaults files, either in the MESA folders or in the documentation?  What did you find?

Cheers,
Warrick

____________

Warrick Ball
Postdoc, School of Physics and Astronomy
University of Birmingham, Edgbaston, Birmingham B15 2TT
W.H.Ball at bham.ac.uk
+44 (0)121 414 4552


On Sun, 4 Oct 2020, mesa-users at lists.mesastar.org wrote:

> Good day to all,
> 
> I am running a simulation on a red dwarf star, and it is always terminated with this message:
> 
> "stopping because of problems dt < min_timestep_limit
> terminated evolution: cannot find acceptable model
> termination code: min_timestep_limit"
> 
> I would like to ask a few questions in regards to this:
> 1. What does this error mean?
> 2. Where is the timestep adjusted? Where do you add the timestep value: &star_job or &controls?
> 
> Thank you in advance for helping me out. The help is very much appreciated. 
> 
> Cheers,
> Bea
> 
> 
>