Resolving cosmic neutrino structure: a hybrid neutrinoN-body scheme

Abstract. We present the first simulation capable of resolving the structure of neutrino clustering on Mpc scales. The method combines grid- and particle-based methods and achieves very good accuracy on both small and large scales, while keeping CPU consumption under control. Such simulations are not only ideal for calculating the non-linear matter power spectrum but also particularly relevant for studies of how neutrinos cluster in galaxy- or cluster-sized halos. We perform the largest neutrino N-body simulation to date, effectively containing 10 different neutrino hot dark matter components with different thermal properties. PACS numbers: 98.65.Dx, 95.35.+d, 14.60.PqResolving Cosmic Neutrino Structure 2 1.