[Mesa-users] Making uniform composition of CO white dwarfs

[harish sorrout]

Respected MESA users,

I want to study the accretion effect on CO white dwarfs. For this I have
generated white dwarf models of mass 0.6 solar mass using test_suite
make_co_WD.  Then I changed carbon oxygen abundances to 0.3 C, 0.5 C and
0.7 C  by making set_uniform_xa_from_file = .true.
All models with different carbon oxygen abundances are terminated at the
same temperature 52000 K effective temperature. But when I compare the
radius of white dwarf Models of different C and O abundances, I found a
radius -1.856382 R_sun for 0.3 C and -1.85159 R_sun for 0.7 C.
    Here I am confused why the radius is different for different
compositions of white dwarf models?  Plots of variation in effective
temperature and radius are attached.

you all are requested to kindly help  me in this regard. What is the reason
behind this?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20211007/14ebcc5f/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: R_age_all.png
Type: image/png
Size: 52640 bytes
Desc: not available
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20211007/14ebcc5f/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Teff_age_all.png
Type: image/png
Size: 56311 bytes
Desc: not available
URL: <https://lists.mesastar.org/pipermail/mesa-users/attachments/20211007/14ebcc5f/attachment-0001.png>