Interacting Hot Dark Matter

Details Interacting Hot Dark Matter Interacting Hot Dark Matter

1997-02-27

arxiv.org/abs/astro-ph/9702236v1

Phys.Rev.D55:5886-5894,1997

Astronomy and Astrophysics

Astrophysics

17 pages, Latex, accepted for publication in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.55.5886

We discuss the viability of a light particle ($\sim 30$ eV neutrino) with strong self-interactions as a dark matter candidate. The interaction prevents the neutrinos from free-streaming during the radiation dominated regime so galaxy sized density perturbations can survive. Smaller scale perturbations are damped due to neutrino diffusion. We calculate the power spectrum in the imperfect fluid approximation, and show that it is damped at the length scale one would estimate due to neutrino diffusion. The strength of the neutrino--neutrino coupling is only weakly constrained by observations, and could be chosen by fitting the power spectrum to the observed amplitude of matter density perturbations. The main shortcoming of our model is that interacting neutrinos can not provide the dark matter in dwarf galaxies.

Affiliated with

Also associated with

No associations

Rating

Interacting Hot Dark Matter 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 Interacting Hot Dark Matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interacting Hot Dark Matter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-391956