1306.3165 (Benedikt Diemer et al.)

On the origin and evolution of cluster scaling relations    [PDF]

Benedikt Diemer, Andrey V. Kravtsov, Surhud More

We investigate whether the evolution of cluster scaling relations is affected by the spurious evolution of mass due to the evolving reference density with respect to which halo masses are defined (pseudo-evolution). We use the relation between mass, M, and velocity dispersion, sigma, as a test case, and find that the deviation from the M-sigma relation of cluster-sized halos due of pseudo-evolution is smaller than 10% for a wide range of mass definitions. The reason for this small impact is a tight relation between the velocity dispersion and mass profiles, sigma(View original: http://arxiv.org/abs/1306.3165