[Mesa-users] Question regarding differences between version 10398 and version 15140

[Bear Ealeal]

Dear Warrick, Thank you, Ealeal

    On Tuesday, February 8, 2022, 12:54:04 PM GMT+2, Warrick Ball <w.h.ball at bham.ac.uk> wrote:  
 
 Hi Ealeal,

There is a changelog, which for r15140 is at

    https://docs.mesastar.org/en/release-r21.12.1/changelog.html#changes-in-r15140

This change is mentioned in the last line of "Other changes".

There's always a chance that a change wasn't logged but the bigger the change (especially if it affects users), the less likely it was missed.

Cheers,
Warrick

____________

Warrick Ball
Postdoc, School of Physics and Astronomy
University of Birmingham, Edgbaston, Birmingham B15 2TT
W.H.Ball at bham.ac.uk
+44 (0)121 414 4552


On Tue, 8 Feb 2022, ealeal44 at yahoo.com wrote:

> Dear Warrick,
> Thank you very much, I will try that. Is there a list of all the differences between versions?
> Thanks,
> Ealeal
> 
> 
> 
> 
> On Monday, February 7, 2022, 11:51:32 AM GMT+2, Warrick Ball <w.h.ball at bham.ac.uk> wrote:
> 
> 
> Hi Ealeal,
> 
> I haven't run the two cases to compare but I would guess that this is because of the new option
> 
>     pre_ms_relax_to_start_radiative_core = .true.
> 
> which was added to `&star_job` in r15140.  After creating the pre-MS model, this control lets the model contract down the Hayashi track until a radiative core first forms.  This is certainly what's happening
> if you see output like
> 
>     waiting for fully convective core to develop
> 
> at the start of the run.
> 
> Depending what you want to do, this may or not be what you want.  If not, you can disable it by setting that control to `.false.`.
> 
> Cheers,
> Warrick
> 
> ___________
> 
> Warrick Ball
> Postdoc, School of Physics and Astronomy
> University of Birmingham, Edgbaston, Birmingham B15 2TT
> W.H.Ball at bham.ac.uk
> +44 (0)121 414 4552
> 
> On Sun, 6 Feb 2022, mesa-users at lists.mesastar.org wrote:
> 
> >
> >
> > Dear MESA users,
> >
> > I am trying to get into the new version of MESA (version 15140). So I run a simple comparison:
> >
> > I run test suits of 1MS_pre_MS to WD in both the old version I had: 10398 and the version of 15140.
> >
> > I understand differences can occur since the examples are not necessarily the same in the inlist or in the defaults of controls or star jobs.
> >
> > So, I looked at the first value of the radius  in the history file at the first time of 10^-5 year in both versions:
> >
> > In 15140 version it is:  logR = 2.8239618681609757E-001
> >
> > In the 10398 version it is:  logR = 1.4680706932337271E+000  
> >
> > Does anyone know why? It is a significant difference, and it appears to be a change in the preliminary conditions of MESA, or am I missing something?
> >
> > Thank you very much,
> >
> > Ealeal
> >
> >
> >
> >
> 
>  
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