[Yt-dev] HaloFinding stars/dm

[Matthew Turk]

I think the idea is correct, but we can do a slightly better
implementation.  I was planning -- as I mentioned to you off list --
to code up something to handle this, but other obligations got in the
way.  So here's what I'd suggest.

Create a new derived quantity, TotalParticleMass.  Add as an optional
argument particle_type (I have no interest in using creation_time any
longer as a distinguishing factor, so feel free to overload the field
in EnzoFields.py) and then "if particle_type is not None" use it as a
cut for the particles.  Otherwise just sum up ParticleMassMsun.

We should be using Quantities here rather than a sum of the data
source's field anyway, and this'll be a great time to convert!

-Matt

On Sat, Jun 20, 2009 at 8:13 PM, Stephen Skory<stephenskory at yahoo.com> wrote:
>
>
>
>> Is there a better way to fix it than this?
>
> I guess what I'm really asking is there a faster way to find out if there are any stars *at all*? If there are no stars and dm_only=True, then we could skip reading creation_time altogether.
>
>  _______________________________________________________
> sskory at physics.ucsd.edu           o__  Stephen Skory
> http://physics.ucsd.edu/~sskory/ _.>/ _Graduate Student
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