[Mesa-users] Problems of Creating a Progenitor in make_pre_ccsn_IIp
Rob Farmer
robert.j.farmer37 at gmail.com
Thu Aug 25 10:10:24 UTC 2022
Hi,
Those options are a brute force way to change the composition of the star.
It's almost certain not what you will want to do. It is also unlikely that
MESA is going to behave well if you try to change the iron core of a
massive star (from make_pre_ccsn_IIp) into a pure carbon oxygen mixture.
MESA also can not model type Ia supernovae, which is what I assume you want
if you are making a star out of carbon and oxygen. Type Ia supernovae also
come from white dwarfs, and make_pre_ccsn_IIp is designed to make massive
stars (to make IIp, Ib, Ic etc) which have iron cores. If you really want a
Ia progenitor then look at the various make WD test cases.
Rob
On Thu, 25 Aug 2022 at 08:15, 陳永濬 via Mesa-users <
mesa-users at lists.mesastar.org> wrote:
> To whom it may concern,
>
> I am Yung-Jiun Chen, currently an undergraduate student studying in the
> Department of Physics at National Taiwan University (NTU).
> Recently, I have been working on the research of superluminous supernovae
> (Project Description: ASIAA Summer Student Program 2022 (sinica.edu.tw)
> <http://events.asiaa.sinica.edu.tw/ssp/2022/project_detail.php?i=3785567d9933f7219bdf66953bc5c290>)
> with MESA.
> I can produce light curves with *make_pre_ccsn_IIp*, *ccsn_IIp,* and
> *STELLA*.
> However, I have problems creating a progenitor in *make_pre_ccsn_IIp*.
> I tried to create a progenitor composed of carbon and oxygen (to make Type
> I supernovae), and I found some commands may be useful in *star_job*,
>
> =====
>
> ! replace_element
> ! ~~~~~~~~~~~~~~~
> ! replace_initial_element
> ! ~~~~~~~~~~~~~~~~~~~~~~~
> ! chem_name1
> ! ~~~~~~~~~~
> ! chem_name2
> ! ~~~~~~~~~~
> ! replace_element_nzlo
> ! ~~~~~~~~~~~~~~~~~~~~
> ! replace_element_nzhi
> ! ~~~~~~~~~~~~~~~~~~~~
>
> ! replace one iso by another in a given range of cells
> ! ``chem_name1`` and ``chem_name2`` from ``chem_def``
>
> ! ::
>
> replace_element = .false.
> replace_initial_element = .false.
> chem_name1 = 'he3'
> chem_name2 = 'he4'
> replace_element_nzlo = -1
> replace_element_nzhi = -1
>
> =====
>
> but the descriptions of how to use them are limited. How can I use them?
> Thanks!
>
> Sincerely,
> Yung-Jiun Chen
> _______________________________________________
> mesa-users at lists.mesastar.org
> https://lists.mesastar.org/mailman/listinfo/mesa-users
>
>
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