The cosmic Mach number: comparison from observations, numerical simulations and non-linear predictions

@inproceedings{Agarwal2013TheCM,
  title={The cosmic Mach number: comparison from observations, numerical simulations and non-linear predictions},
  author={Shruti Agarwal and Hume A. Feldman},
  year={2013}
}
We calculate the cosmic Mach number M – the ratio of the bulk flow of the velocity field on scale R to the velocity dispersion within regions of scale R. M is effectively a measure of the ratio of large-scale to small-scale power and can be a useful tool to constrain the cosmological parameter space. Using a compilation of existing peculiar velocity surveys, we calculate M and compare it to that estimated from mock catalogues extracted from the LasDamas (a ΛCDM cosmology) numerical simulations… CONTINUE READING