[Mesa-users] Models failing to reach core collapse

[Jamie Tayar]

Hi Taylor,
This isn't really my area of expertise, so I'll let someone else comment on
the details of your models, but 15 solar masses is right around where the
'islands of explodability' start to show up (e.g. Figure 5 of
https://arxiv.org/abs/1602.05956 or Figure 8 of
https://arxiv.org/pdf/1710.03243.pdf), and some fraction of models never
reach the sort of compactness that indicates a successful collapse, so
there's a possibility that what you're seeing is physics and not numerics.
Apologies if you've already thought of that,
Jamie

On Wed, Jan 16, 2019 at 6:25 PM Taylor Jacovich via Mesa-users <
mesa-users at lists.mesastar.org> wrote:

> Hello all,
>
> Have run into an issue with the current version of MESA where stars with a
> specific mass will never reach core-collapse (fe_core_infall > 10**3km/s
> stopping condition).  A full description of the issue and all the model
> data can be found here: https://gitlab.com/wind-loss-testing/readme .
>
> The reader’s digest version is that stars with a certain mass (eg.
> 15.0Msun) will get stuck at a sub-Chandrasekhar mass iron core and happily
> coast for weeks at a time.  Meanwhile masses directly around the ones that
> fail to collapse (eg. 14.9Msun and 15.1Msun) will collapse without fail.
> We are using Farmer’s inlists that were designed to help with
> explodability, and the only parameter we change between runs is the mass.
> Any suggestions on new parameters to try or other options that may relieve
> the issue are much appreciated. Inlists are attached below, or you can
> clone from this directory
> https://gitlab.com/wind-loss-testing/windloss-template to have an
> identical experience.
>
> Thank you,
>
>
> Taylor Jacovich
>
>
>
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