[yt-users] Dealing with HOP groups

[Sam Skillman]

Hi Shankar,

Do you have a line that looks like:
hp.add_halo_filter(HP.VirialFilter,must_be_virialized=True,
                   overdensity_field='ActualOverdensity',
                   virial_overdensity=200,
                   virial_filters=[['TotalMassMsun','>=','1e14']],
                   virial_quantities=['TotalMassMsun','RadiusMpc'])

If so, please post it.  The number of halos > 10^14 Msun is fairly close to
500 in a 200 Mpc box.  If you want the halo profiler to use all halos, set
virial_filters=[['TotalMassMsun','>=','1e14']]  accordingly.

Sam

On Sun, Feb 28, 2010 at 11:08 AM, Agarwal, Shankar <sagarwal at ku.edu> wrote:

> Hi Stephen,
>
> I read
> http://lists.spacepope.org/pipermail/yt-users-spacepope.org/2009-March/000110.html
>
> Do you remember the cosmology parameters for your run: particles, grid,
> box, refinement, AMR ON or OFF ?
>
>
> I have run a 200 Mpc/h box, 512^3 particle, 512^3 grid, AMR-OFF simulation
> and I get about 30,000 halos using HOP. When I try to finding virial halos,
> I get only 500. I may have to increase the grid to 1024^3.
>
> Let me know how you got 40,000 virial halos.
>
> Thanks
> Shankar
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-- 
Samuel W. Skillman
DOE Computational Science Graduate Fellow
Center for Astrophysics and Space Astronomy
University of Colorado at Boulder
samuel.skillman[at]colorado.edu
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