[Mesa-users] The color and V band mag of the current Sun and solar-type stars

[Aaron Dotter]

Before checking the magnitudes, I recommend you try to reproduce the solar
Teff, L, and R.  See, for example, the simplex_solar_calibration in the
test suite.

Independently, check whether or not the mesa/colors module is able to
reproduce the solar colors for the solar metallicity, Teff and log(g).
This can be done irrespective of the solar evolutionary track; you can
simply call the colors module with the solar parameters as input.

On Fri, Oct 4, 2019 at 3:54 PM M Sun via Mesa-users <
mesa-users at lists.mesastar.org> wrote:

> Hello MESA users,
>
> Recently I am trying to produce some evolutionary tracks for solar-type
> stars in an open cluster. The luminosity, effective temperature agree with
> the observation very well. However, when I check the color magnitude
> diagram, those solar-type stars seem much bluer than observation near the
> main sequence phase.
>
> Then I tried to make a track for the current Sun with different initial
> metallicities and mixing length factors (still in the proper range I
> think), it is bluer than I expected as well. Here I attached my plot. The V
> mag and B mag I used for the current Sun (shown in the red star in the
> plot) are --
> solar_abs_V = 4.83
> solar_abs_B = 5.48
> The open circles indicate the age at 1, 2 ... 6 Gyrs from the bottom right
> to top left. I terminate the simulations after 6 Gyrs.
>
> I am using MESA 12115 in the test_suite working directory
> "1M_pre_ms_to_wd". Here I attached my inlists and please let me know if you
> need more information. The atmosphere table I used is 'photosphere'. Many
> thanks!!
>
> cheers,
> Meng
> --------------
> Meng Sun
> University of Wisconsin Madison
> https://sunmeng1118.wixsite.com/mysite
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>
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