Cluster Gas
From Eric's Wiki
Viola07 look at cooling in SPH simulations and compare it to a classical model and a prediction from MORGANA. They find, unsuprisingly, that SPH cools more gas. But they attribute the difference to errors in the classical model and MORGANA. Just craziness. Many of the plots look like those in Thacker, et al 2000, but they don't reference it.
References
Viola07: Viola, Monaco, Borgani, Murante, Tornatore 0710.2473