1106.3327 (Yin-Zhe Ma et al.)

Cosmic Mach Number: A Sensitive Probe for the Growth of Structure    [PDF]

Yin-Zhe Ma, Jeremiah P. Ostriker, Gong-Bo Zhao

In this Letter, we investigate the potential power of the Cosmic Mach Number (CMN), which is the ratio between the mean velocity and the velocity dispersion of galaxies as a function of cosmic scales, to constrain cosmologies. We first measure the CMN from 5 catalogues of galaxy peculiar velocity surveys at low redshift (0.002View original: http://arxiv.org/abs/1106.3327