[Mesa-users] Difficulty producing models using example_make_pre_ccsn inlists
jwnicoll at outlook.com
Thu Jul 30 13:58:13 EDT 2020
I apologize if I should have started a new thread, but I think my question is a follow up to this one.
What does the example_make_pre_ccsn test suite do differently from the MESA_DIR/star/work directory? In principle, I would expect the same result if I evolve a star to the onset of core-collapse using either procedure, so what is the advantage of having the test suite?
From: Francis Timmes <fxt44 at mac.com>
Sent: Monday, June 29, 2020 8:00 AM
To: Jake Nicoll <jwnicoll at outlook.com>
Cc: Frank Timmes <fxt44 at mac.com>; mesa-users <mesa-users at lists.mesastar.org>
Subject: Re: [Mesa-users] Difficulty producing models using example_make_pre_ccsn inlists
attached is my current baseline inlist for 12778.
it has been tested for 12-40 msun with ∆m = 1 msun and all go to the onset of core-collapse.
this 12778 inlist is getting attention as ebraheem farag and i are using it for a project.
also attached is my current pgstar dashboard inlist.
> On Jun 29, 2020, at 7:40 AM, Jake Nicoll via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> Thank you for the feedback. I will try to implement the suggestions.
> From: Jared Goldberg <jagoldberg18 at gmail.com>
> Sent: Sunday, June 28, 2020 3:22 PM
> To: Jake Nicoll <jwnicoll at outlook.com>
> Cc: mesa-users at lists.mesastar.org <mesa-users at lists.mesastar.org>
> Subject: Re: [Mesa-users] Difficulty producing models using example_make_pre_ccsn inlists
> Hi Jake,
> I've run into the same problems when using revisions 11000 and greater. Unfortunately, there isn't a simple solution in the current MESA revision. Turning off gold tolerances helps, and sometimes reverting to the old EOS options (use_eos_DT2 = .false. and use_eos_ELM = .false.) helps sometimes. If that doesn't work or if you don't want to turn off gold tolerances and/or you don't want to revert back to using 10398 for the progenitor models, I recommend looking at/adopting Frank Timmes's inlist parameters from the mailing list back in February/March 2020 (Ermal's thread, [Mesa-users] Failed to produce type II supernova progenitor with mesa 12115) for your pre-core-collapse models in 12115.
> Hope this helps,
> On Jun 28, 2020, at 3:08 PM, Bill Paxton <paxton at kitp.ucsb.edu> wrote:
> Hi Jake,
> The next public release will include a completely new test case for making pre_ccsn_IIp models that should be much more robust than what’s out there now (you are not alone in having problems with it).
> Until then, your best bet is to find cases that work and use them.
> On Sun, Jun 28, 2020 at 2:44 PM Jake Nicoll via Mesa-users <mesa-users at lists.mesastar.org> wrote:
> Hi all,
> I am using the example_make_pre_ccsn and example_ccsn_IIp test suites in the 12778 version of mesa (with the SDK released on March 1, 2020) in order to model SNe light curves. I think I am having more problems than I would expect to have in generating models using the example_make_pre_ccsn test suite inlists.
> For example, I ran the example_make_pre_ccsn inlists for a star of 14 solar masses with omega/omega_crit = 0.2, Z=Z_base=0.02, and eta_wind=1.0. The inlist_common where I set these parameters is attached. All other parameters are left as the defaults. I receive the following error while running inlist_to_si_burn:
> stopping because of problems dt < min_timestep_limit
> I have tried lowering the minimum time step by several orders of magnitude, which does not fix the problem.
> However, these input parameters were used by Ricks and Dwarkadas to produce a model for the 1999em SN. They used the 10398 version of the code, so I ran the same input parameters in the 10398 version (using the 10398 SDK released August 22, 2018) and successfully produced a model.
> I am not sure what changed in the code that is now causing this dt error. One obvious change is that there was no inlist_to_si_burn in the 10398 version's example_make_pre_ccsn. This inlist saves a model once the core reaches a si28 mass fraction of 0.4. (I think) I should expect this mass fraction to be achieved by a star with the initial mass I am considering, so I am not sure why this inlist fails to produce a model.
> -Jake Nicoll
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