[Mesa-users] How to evolve with larger time step

[Josiah Schwab]

Hello Harish,

 I am accreting helium on a white dwarf with accretion rate 1d-6 solar mass
> per yr and when helium burning starts then it evolve with very small time
> steps. Is there any way to evolve the helium accreting white dwarfs with
> high accretion rates with higher time steps?  So that I can evolve it upto
> the Chandrasekhar limit. Kindly help me in this regard.
>

You haven't provided enough information in your message for us to provide
specific help.

In general, following He accreting WDs all the way to the Chandrasekhar
mass is challenging because you usually spend at least some of the time in
regions of unstable He burning.  Following models through He flashes
requires short timesteps because of the short associated physical
timescales.

If you have a scenario where you are seeing models take short timesteps for
numerical reasons while in a regime where you would physically expect to be
able to take long timesteps, then send sufficient information to reproduce
the problem along with some explanation of the specific issue you're seeing.

Josiah
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