[mesa-users] Overflowing initial model for binary systems

[Talha Irfan]

I don't think I ever looked into that option. That seems to have fixed it.

Thank you so much!

Best,
Talha

Talha Irfan Khawaja
Physics '19
Georgia Institute of Technology

On 18 July 2017 at 19:30, Pablo Marchant <pamarca at gmail.com> wrote:

> Apparently, you are using the default inlist_zams_specification which only
> produces a model for a single mass, 20 Msun. This is set by the options
>
>     mlo = 1.30102999566398d0
>     mhi = 1.30102999566398d0
>     dmass = 0.6d0
>
> in that inlist, where mlo and mhi are the logarithm of the masses to be
> included in the ZAMS file, and dmass is the logarithmic interval between
> models. So your binary model runs into problems trying to initiate with
> different initial masses, because the ZAMS file only provides one mass.
> Actually, if I switch in your inlist project m1=20 and m2=20, it works
> without problems.
>
> The reason the default in the test_suite has those values is just because
> its a test, what you really want is to sample multiple masses to create
> your ZAMS models. This is something you only have to do once for a choice
> of composition, then you can reuse the saved models permanently by putting
> it in $MESA_DIR/data/star_data/zams_models/.
>
> In particular for some of my models I do
>
>    ! do masses 10**lgm, for lgm = mlo to mhi by dmass
>    mlo = 0
>    mhi = 2
>    dmass = 0.02d0
>
> This will take a while, as it has to compute 100 stellar models, but as I
> said, this is a thing you do only a very limited amount of times.
>
> Cheers
>
> On Tue, Jul 18, 2017 at 4:22 PM, Talha Irfan <tlh.irfan at gmail.com> wrote:
>
>> I've attached a couple of the more recent models I've been using. The
>> file 'z1d_2.data' is the most recent, and the one which I was testing with
>> the inlists from earlier.
>>
>> Best,
>> Talha
>>
>> Talha Irfan Khawaja
>> Physics '19
>> Georgia Institute of Technology
>>
>> On 18 July 2017 at 15:56, Pablo Marchant <pamarca at gmail.com> wrote:
>>
>>> Hi Talha,
>>>
>>> can you provide your zams models as well to avoid having to recompute
>>> them?
>>>
>>> On Jul 18, 2017 1:57 PM, "Talha Irfan" <talhairfan at gatech.edu> wrote:
>>>
>>>> Hi everyone,
>>>>
>>>> I've been using MESA to investigate population II and III stars by
>>>> controlling this intial_z value for singular stars. This was working fine
>>>> until I moved to the binary case, where I used the second set of
>>>> instructions from this
>>>> <https://sourceforge.net/p/mesa/mailman/message/34896105/> post to
>>>> create my own ZAMS model with certain initial_z values, then matching that
>>>> in the inlists from the binary work folder.
>>>>
>>>> I've been having problems trying to evolve the system, even if I set
>>>> evolve_both_stars to false (after initially trying true). The first
>>>> termination code read "Terminate because of overflowing initial model", so
>>>> I tried increasing the initial period as some users had suggested, and
>>>> later tried setting ignore_rlof to true, both of which resulted in failure
>>>> to find a suitable model. I'm not really sure where to go from here, so
>>>> I've attached my inlists (the only ones I edited) and the
>>>> inlist_zams_specification I used. I'd greatly appreciate any help with this.
>>>>
>>>> Thanks!
>>>>
>>>>
>>>> Talha Irfan Khawaja
>>>> Physics '19
>>>> Georgia Institute of Technology
>>>>
>>>>
>>>> ------------------------------------------------------------
>>>> ------------------
>>>> Check out the vibrant tech community on one of the world's most
>>>> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
>>>> _______________________________________________
>>>> mesa-users mailing list
>>>> mesa-users at lists.sourceforge.net
>>>> https://lists.sourceforge.net/lists/listinfo/mesa-users
>>>>
>>>>
>>
>
>
> --
> Pablo Marchant Campos
> M.Sc on Astrophysics, Universidad Católica de Chile
> PhD on Astrophysics, Argelander-Institut für Astronomie, Universität Bonn
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20170718/7f77f1e7/attachment.html>
-------------- next part --------------
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
-------------- next part --------------
_______________________________________________
mesa-users mailing list
mesa-users at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/mesa-users