Massive neutrinos in large-scale gravitational clustering

Details Massive neutrinos in large-scale gravitational clustering Massive neutrinos in large-scale gravitational clustering

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...264...59m&link_type=abstract

Astrophysical Journal, Part 1, vol. 264, Jan. 1, 1983, p. 59-78, 84-86.

Astronomy and Astrophysics

Astrophysics

60

Galactic Structure, Gravitational Collapse, Neutrinos, Particle Theory, Galactic Evolution, Halos, Space Density

Scientific paper

A large-scale simulation is made of the plane-symmetric collapse of massive neutrinos. It is found that a condensation forms in the central plane with high mass density, a velocity dispersion much lower than the mean value, and a phase space density which is nearly equal over a large region to the maximum of the original distribution. The coarse-grain average phase space density over the central megaparsec is comfortably higher than that for an extended galactic halo. It is concluded that there is no obstacle to the formation of massive neutrino galactic halos in the neutrino variant of the adiabatic theory of galaxy formation, because a population of neutrinos arises which may easily be bound into galactic halos. The calculations, with the exception of the thermal broadening, will apply to any system of collisionless particles.

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