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

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

2009-08-14

arxiv.org/abs/0908.1969v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

13 pages, 6 figures

Scientific paper

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.

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