Formation of small-scale structure in SUSY CDM

Details Formation of small-scale structure in SUSY CDM Formation of small-scale structure in SUSY CDM

2002-11-14

arxiv.org/abs/astro-ph/0211325v1

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figures, to appear in proceedings of "IDM 2002, 4th International Workshop on the Identification of Dark Matter"

Scientific paper

The lightest supersymmetric particle, most likely the lightest neutralino, is one of the most prominent particle candidates for cold dark matter (CDM). We show that the primordial spectrum of density fluctuations in neutralino CDM has a sharp cut-off, induced by two different damping mechanisms. During the kinetic decoupling of neutralinos, non-equilibrium processes constitute viscosity effects, which damp or even absorb density perturbations in CDM. After the last scattering of neutralinos, free streaming induces neutralino flows from overdense to underdense regions of space. Both damping mechanisms together define a minimal mass scale for perturbations in neutralino CDM, before the inhomogeneities enter the nonlinear epoch of structure formation. We find that the very first gravitationally bound neutralino clouds ought to have masses above 10^{-6} solar masses, which is six orders of magnitude above the mass of possible axion miniclusters.

Affiliated with

Also associated with

No associations

Rating

Formation of small-scale structure in SUSY CDM 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 Formation of small-scale structure in SUSY CDM, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Formation of small-scale structure in SUSY CDM will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-473283