[Mesa-users] Re3: He star models evolve with high metallicity

[辛文宇]

Hi EbF,




Thanks for your suggestions and tests.

> I pasted your inlists into the test_suite case ppisn and added "okay_to_reduce_gradT_excess = .true."  to the inlist_ppisn with:


> initial_mass = 70.00d0
> initial_Y = 0.99d0
> initial_Z = 1d-2




> and the model ran with no issues to he_depletion. Hopefully this works for you :)

Do you change the value of Zbase?

The default values of initial_Z and Zbase are 1E-3. If I just change initial_Z=1E-2, the model can go through well.

But the wind mass loss is determined by Zbase not Z. If Zbase is 1E-2, the model may not reach the He ignition.




Thanks,

Wenyu



-----原始邮件-----
发件人:"Ebraheem Farag" <ekfarag at asu.edu>
发送时间:2023-05-06 09:02:35 (星期六)
收件人: "辛文宇" <xinwenyu16 at mails.ucas.ac.cn>
抄送: "mesa-users at lists.mesastar.org" <mesa-users at lists.mesastar.org>
主题: Re: Re2: [Mesa-users] He star models evolve with high metallicity


Hello 辛文宇(Wenyu),


My bad, I forgot you are not using r22.11.1, it appears that using superad_reduction makes the pre-ms have issues converging.


In r15140, how about set "okay_to_reduce_gradT_excess = .true." in inlist_to_he_dep or inlist_ppisn, and your model should run fine.
I pasted your inlists into the test_suite case ppisn and added "okay_to_reduce_gradT_excess = .true."  to the inlist_ppisn with:


initial_mass = 70.00d0
initial_Y = 0.99d0
initial_Z = 1d-2



and the model ran with no issues to he_depletion. Hopefully this works for you :)


-EbF




-EbF


On Fri, May 5, 2023 at 5:10 PM 辛文宇 <xinwenyu16 at mails.ucas.ac.cn> wrote:


Hi EbF,




Thanks for your suggestion very much.




I use MESA-12778, there is no 'use_superad_reduction = .true.' in this version.

I also try 15140 which have 'use_superad_reduction = .true.'.

But when I include 'use_superad_reduction = .true.' in inlist_to_he_dep, there are too many retries

and stop because:




failed in relax_to_radiative_core
failed in do_relax_to_radiative_core
star_create_pre_ms_model ierr          -1
do_load1_star ierr          -1
before_evolve_loop ierr




More output are shown in 72M.log in detail. Please check, if needed.

It seems that the 'ppisn' models in 15140 is different with that in 11532 in some places.

Thus, if I use 11532 version, where is no 'use_superad_reduction = .true.'

How to solve this problem.



Thanks,

Wenyu



-----原始邮件-----
发件人:"Ebraheem Farag" <ekfarag at asu.edu>
发送时间:2023-05-05 18:18:34 (星期五)
收件人: "辛文宇" <xinwenyu16 at mails.ucas.ac.cn>
抄送: "mesa-users at lists.mesastar.org" <mesa-users at lists.mesastar.org>
主题: Re: [Mesa-users] He star models evolve with high metallicity


Hello 辛文宇 (Wenyu),


Try 'use_superad_reduction = .true.'. You might want to turn this off, after He burning.


-EbF






On Fri, May 5, 2023 at 2:17 AM 辛文宇 <xinwenyu16 at mails.ucas.ac.cn> wrote:


Hi everyone,




I'm trying to evolve the He star models in high metallicity with 'ppisn' in the test_suite.

The models can go through with Z=1E-3 well. But when I use Z=0.01 or 0.02, the timesteps

become very small after logT reaches 7.5 K (Model Number = 2000). Then from 2000 to 100000,

logT increase from 7.5 to 7.6. The inlist file and screenshots are attached.




I am not sure why this model cannot ignite He burning with high metallicity.

In order to make this model go through with Z=0.01 or 0.02 well, besides initial_Z and Zbase,

which parameters should also be changed ?




Thanks very much!

Wenyu

_______________________________________________
mesa-users at lists.mesastar.org
https://urldefense.com/v3/__https://lists.mesastar.org/mailman/listinfo/mesa-users__;!!IKRxdwAv5BmarQ!Z9jBtOlGL7QgsTA3kM4ZeQ4OCSfNc2EcTdVrZkREH25ibZCdj-adRA_imfHCZXvkdyp04dcAXHmW8-DginB59P8jiQ$

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20230508/9ff6251a/attachment.htm>