Kavli Affiliate: Risa Wechsler
| First 5 Authors: Joseph DeRose, Nickolas Kokron, Arka Banerjee, Shi-Fan Chen, Martin White
| Summary:
We present the Aemulus $nu$ simulations: a suite of 150 $(1.05 h^{-1}rm
Gpc)^3$ $N$-body simulations with a mass resolution of $3.51times 10^{10}
frac{Omega_{cb}}{0.3} ~ h^{-1} M_{odot}$ in a $wnu$CDM cosmological
parameter space. The simulations have been explicitly designed to span a broad
range in $sigma_8$ to facilitate investigations of tension between large scale
structure and cosmic microwave background cosmological probes. Neutrinos are
treated as a second particle species to ensure accuracy to $0.5, rm eV$, the
maximum neutrino mass that we have simulated. By employing Zel’dovich control
variates, we increase the effective volume of our simulations by factors of
$10-10^5$ depending on the statistic in question. As a first application of
these simulations, we build new hybrid effective field theory and matter power
spectrum surrogate models, demonstrating that they achieve $le 1%$ accuracy
for $kle 1, h,rm Mpc^{-1}$ and $0le z le 3$, and $le 2%$ accuracy for
$kle 4, h,rm Mpc^{-1}$ for the matter power spectrum. We publicly release
the trained surrogate models, and estimates of the surrogate model errors in
the hope that they will be broadly applicable to a range of cosmological
analyses for many years to come.
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