[Mesa-users] Trouble with binary models for a certain range of parameters

[Evan Bauer]

Hi Natsuko,

Have you tried running your model for star 1 outside of binary to see if that helps? It looks like you're doing some relaxation of the starting model at the beginning that might make things difficult for binary before the model settles into its initial configuration. One option might be to start by doing that relaxation with a single star work directory outside of binary, then save it before it evolves very far to use as a starting model for the binary work directory. Does that help?

Cheers,
Evan

> On Feb 9, 2023, at 3:01 PM, Yamaguchi, Natsuko via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> 
> Hello,
> 
> I am trying to run some binary models (WD + MS, RLOF mass transfer) but am experiencing some difficulties. Any help would be greatly appreciated.
> 
> I want to look at the changes in the evolution fixing m2 (= 0.7 Msun, point mass) and varying m1. My problem is that while m1 = 1.0 and 1.5 Msun with initial periods p0 ~ 1 - 3 days run fine, masses in between these values (ex. 1.3, 1.4 Msun) causes the models to terminate (after the first timestep or shortly after).
> 
> It retries many times due to max_residual > tol_residual_norm and the termination code is min_timestep_limit. I have attached all inlist files to this email.
> 
> If anyone has any idea what the issue could be or what would be the best way to avoid it, please let me know. I am still on a learning curve with MESA and binaries in general. 
> 
> Thank you!
> 
> Best,
> Natsuko Yamaguchi
> 
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