[mesa-users] wd asteroseismology

[Choi, Jieun]

Hi Jing,

The "redo with smaller timestep to get closer to stopping target" message
in the terminal output is not a problem.

The inlist you attached contains:

      xa_central_lower_limit_species(1) = 'h1'
      xa_central_lower_limit(1) = 0.001

      when_to_stop_rtol = 1d-5
      when_to_stop_atol = 1d-5

This is telling MESA to stop the calculations when the central hydrogen
abundance reaches 0.001, or 0.1000000000E-02. Your inlist also specifies
the desired relative and absolute error tolerances (read about them here:
http://mesa.sourceforge.net/controls_defaults.html#when_to_stop_rtol). So
MESA is simply reducing the time steps as it nears the end of the evolution
in order to meet those stopping criteria.

Hope this helps!

-Jieun

On Wed, Sep 28, 2016 at 2:03 PM, Jing Luan <jingluan.xw at gmail.com> wrote:

> Hello,
>
> I used star/test_suite/wd_surf_tau_1m4 to make a 0.6Msun white dwarf with
> Teff=10195 and log(g)~8. I input this model to star/test_suite/adipls_pulse
> to calculate its g mode frequency map. However, it does a lot of redos
> reducing the time step, one example of the output in the terminal is quoted
> below:
>
> 1st model retry log10(dt/yr)   -1.7921584698646690D+01
>
>
> redo with smaller timestep to get closer to stopping target
> 0.1167063354E-58    0.1000000000E-02
>
>        6021   6.958330   9942.668  -3.863284  -3.863284   0.604404
> 0.000107   0.000000   0.000000   0.303811   0.000078 391.960076   1310
> 0
>
>  -17.921585   6.579841  -1.895884 -48.202552  -5.392151 -99.000000
> 0.604297   0.000000   0.723766   0.034697   0.013251  87.435464    114
> 1
>
>  6.1943E+08  23.296547  -2.848282 -19.566950   5.509990  -6.203180
> 0.578631   0.252617   0.019530  1.000E+00  9.867E-01  0.185E+08
> varcontrol
>
>
> Anyone has some clue what might be wrong. Three files are attached.
>
> 1, The white dwarf model file
>
> 2,The beginning part of the terminal output is also attached.
>
> 3, inlist file
>
>  Many thanks :-D
>
> Sincerely,
>
> Jing
>
> ------------------------------------------------------------
> ------------------
>
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