[Mesa-users] Massive Stars and Large Networks

[Sandoval, Chloe]

Hi Rob,

Thank you for the quick response! I will definitely take a look at the
models you suggested.

I have had minor success with the split-burning in r12115 (I think) but I
run into issues (not with MESA) with another code I use after the fact when
I remap the MESA models onto a different grid. Instead of doing the usual
core-collapse thing, I get what I deem "core-explosion" supernovae which
doesn't happen when I use a MESA model that doesn't utilize split-burning.
Definitely more to investigate there, on my end. So I'll give it a shot
with the newer revisions and see if that helps!

I'm open to any and all suggestions, if there are more!

Thanks again, Rob!

-Chloe



On Tue, Jul 12, 2022 at 1:58 PM Rob Farmer <robert.j.farmer37 at gmail.com>
wrote:

> Hi
> I suggest looking at the models here
> https://ui.adsabs.harvard.edu/abs/2021ApJ...923..214F/abstract which got
> 11-45 msun models to CC. These were with a small network but I have also
> used these inlists with a larger net as well.
>
> split_burn is the way to go these days, but I would recommend using at
> least 12115  or 12778 as I have fixed many bugs present in the earlier
> releases, that you will hit with a large net and with split_burn.
>
> Rob
>
> On Tue, 12 Jul 2022 at 19:45, Sandoval, Chloe via Mesa-users <
> mesa-users at lists.mesastar.org> wrote:
>
>> Hi Mesa Users,
>>
>> I'm reaching out not for direct problem solving but more for a discussion
>> or tips and tricks for those of you who use MESA for massive stars with
>> large networks.
>>
>> Is anyone successfully using large networks ( > 150 species) to collapse
>> massive stars? If so, what are your secrets, please share them?
>>
>> I've had very inconsistent success with models reaching collapse
>> (fe_infall = 1000 km/s) in the mass range of 10M_sun - 16 M_sun using
>> mesa_204.net and have had many successes with masses larger than
>> 16M_sun. I've used multiple revisions as early as r10398 and as new as
>> r117** whichever one was updated to fix the memory leak. I've used a
>> variety of networks and test cases, used test case inlists, split-burning,
>> modeled inlists after the Farmer 2015 paper, adjusted a variety of
>> tolerances, adjusting mixing and convective overshooting parameters, etc.,
>> etc.. Many of my models grind themself to a halt, fail in the hydro, or get
>> extremely small time steps and make no progress.
>>
>> Thank you everyone for your time! Looking forward to hearing your
>> thoughts!
>>
>> Chloe Sandoval
>> *she, her, hers*
>> Graduate Research Assistant
>> GSS Physics Department Representative
>> Office: ORNL 4500S R211
>> _______________________________________________
>> mesa-users at lists.mesastar.org
>> https://lists.mesastar.org/mailman/listinfo/mesa-users
>>
>>
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