[Yt-dev] minimum halo mass

[Matthew Turk]

> which is a lot of padding. I find that at and above a padding of about 0.05 for this dataset things don't change.

Yeah, looks like my math was wrong; it gave the opposite result of
what I thought it should!

> where f() is some reasonable mapping of halo mass to halo radius. maximum_expected_halo_size can be calculated from the cosmology and a rough halo mass function. It's not neccessary to do a high-quality estimate, I think.

I think you're right, we don't want to over-engineer the problem.

> So... comments? Am I confused? Any ideas of what is a reasonable f() and rough halo mass function should be?

I'm okay with just coming up with something and then setting that as
the default and then allowing users to override.  Why not use an
overdensity of 200 (or, even, density_threshold?) and multiply that by
4/3 pi radius^3?  Am I misunderstanding?

-Matt