# 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} }

- Published 2013
DOI:10.1093/mnras/stt464

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