Hi Shankar,<div><br></div><div>Do you have a line that looks like:</div><div><div>hp.add_halo_filter(HP.VirialFilter,must_be_virialized=True,</div><div>                   overdensity_field=&#39;ActualOverdensity&#39;,</div>

<div>                   virial_overdensity=200,</div><div>                   virial_filters=[[&#39;TotalMassMsun&#39;,&#39;&gt;=&#39;,&#39;1e14&#39;]],</div><div>                   virial_quantities=[&#39;TotalMassMsun&#39;,&#39;RadiusMpc&#39;])</div>

<div><br></div><div>If so, please post it.  The number of halos &gt; 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=[[&#39;TotalMassMsun&#39;,&#39;&gt;=&#39;,&#39;1e14&#39;]]  accordingly.</div>

<div><br></div><div>Sam</div><br><div class="gmail_quote">On Sun, Feb 28, 2010 at 11:08 AM, Agarwal, Shankar <span dir="ltr">&lt;<a href="mailto:sagarwal@ku.edu">sagarwal@ku.edu</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">

Hi Stephen,<br>
<br>
I read <a href="http://lists.spacepope.org/pipermail/yt-users-spacepope.org/2009-March/000110.html" target="_blank">http://lists.spacepope.org/pipermail/yt-users-spacepope.org/2009-March/000110.html</a><br>
<br>
Do you remember the cosmology parameters for your run: particles, grid, box, refinement, AMR ON or OFF ?<br>
<br>
<br>
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.<br>
<br>
Let me know how you got 40,000 virial halos.<br>
<br>
Thanks<br>
Shankar<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Samuel W. Skillman<br>DOE Computational Science Graduate Fellow<br>Center for Astrophysics and Space Astronomy<br>University of Colorado at Boulder<br>samuel.skillman[at]<a href="http://colorado.edu">colorado.edu</a><br>


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