Resolving Cosmic Neutrino Structure: A Hybrid Neutrino N-body Scheme

Understand

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.