How galaxies acquire their neutrino haloes

Details How galaxies acquire their neutrino haloes How galaxies acquire their neutrino haloes

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.301..584b&link_type=abstract

Nature, vol. 301, Feb. 17, 1983, p. 584, 585.

Computer Science

28

Capture Effect, Cosmology, Galactic Evolution, Many Body Problem, Neutrinos, Dark Matter, Galactic Structure, Particle Mass, Particle Motion

Scientific paper

One-dimensional simulations of the nonlinear growth of structure in a universe dominated by a population of nonrelativistic collisionless particles such as massive neutrinos show that a subpopulation of slowly moving particles exists within the "pancakes" that form. These particles can cluster in a low velocity condensate around any seed perturbation which may be present. The schematic calculation of this aggregation presented here suggests that the properties of neutrino clusters depend only weakly on seed mass but substantially on seed separation. Their mass and velocity dispersion may be quite comparable with the values inferred for the haloes of "dark" matter surrounding real galaxies.

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