Improved recipes for peculiar velocity power spectra using Evolution Mapping

Matteo Esposito, Ariel G. Sánchez, Julien Bel +1

We present new fitting functions for the velocity divergence auto- and cross-power spectra, $P_{\theta \theta }(k)$ and $P_{\delta \theta }(k)$, calibrated on gravity-only $N$-body simulations. By applyin…