Neutrinos in Non-linear Structure Formation - a Simple SPH Approach

Details Neutrinos in Non-linear Structure Formation - a Simple SPH Approach Neutrinos in Non-linear Structure Formation - a Simple SPH Approach

2011-10-06

arxiv.org/abs/1110.1257v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

13 pages, 7 figures

Scientific paper

We present a novel method for implementing massive neutrinos in N-body simulations. Instead of sampling the neutrino velocity distribution by individual point particles we take neutrino free-streaming into account by treating it as an effective redshift dependent sound speed in a perfect isothermal fluid, and assume a relation between the sound speed and velocity dispersion of the neutrinos. Although the method fails to accurately model the true neutrino power spectrum, it is able to calculate the total matter power spectrum to the same accuracy as more complex hybrid neutrino methods, except on very small scales. We also present an easy way to update the publicly available Gadget-2 version with this neutrino approximation.

Affiliated with

Also associated with

No associations

Rating

Neutrinos in Non-linear Structure Formation - a Simple SPH Approach does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Neutrinos in Non-linear Structure Formation - a Simple SPH Approach, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutrinos in Non-linear Structure Formation - a Simple SPH Approach will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-181556