Hi Peter, I've CC'd yt-dev on the reply. I think that the total mass in a halo would also be a reasonable proxy; calculating the virial radius is more expensive, but also doable. If we added a total mass scaling, would you suggest scaling the mass by using the implicit volume of the circle plotted? -Matt On Thu, Aug 5, 2010 at 2:14 PM, Peter Behroozi wrote:

Hi Matt,

Since Ji-hoon mentioned that the Yt recipe plots the maximum halo radius instead of Rvir, would there be a simple change to plot a different, more stable halo parameter instead?  As shown below, the circles as currently plotted change quite a bit in size between timesteps. :)

All best,

Peter