[Mesa-users] Creating a Highly Irradiated Super-Earth

[Brian Jackson]

Dear MESA Users,
I am still struggling to create highly-irradiated super-Earths using MESA.

I have attached the inlists and saved models I'm using to create a
20-Earth mass planet with an envelope mass fraction of 20% (i.e., a
core mass of 16 Earth masses) and an irradiation 20 times Earth's
(i.e., 2.72e7 ergs/s/cm^2).

I attempt to create the planet by irradiating a gas giant planet and
then relaxing the mass down to my desired mass. (I've found doing it
the other way around leads to badness.) I've tried tweaking lots of
settings, but nothing seems to work. In the end, I wind up with a
timestep below the suggested minimum of 9.9999999999999995D-07.

I am using Mac OS 10.13.1, MESA 11701, and the most recent version of
the SDK (August 30 2019).

Please forgive me if I forgot any required information.

Thanks,
Brian
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