Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gregr..13..101s&link_type=abstract
General Relativity and Gravitation, vol. 13, Feb. 1981, p. 101-107.
Astronomy and Astrophysics
Astrophysics
19
Astrophysics, Neutrinos, Particle Mass, Relic Radiation, Universe, Galactic Clusters, Hubble Constant, Interstellar Gas, Mass Distribution, Nuclear Fusion, Nucleons, Particle Density (Concentration)
Scientific paper
Consideration is given to possible evidence in the current structure of the universe for the dominance of massive neutrinos. The mass density in ordinary matter (nucleons) relative to that needed to close the universe is examined, and upper and lower limits to this density are derived from considerations of primordial nucleosynthesis and studies of galaxies and hot gas in clusters, respectively. It is noted that the requirement that the lower bound to the mass density in nucleons be consistent with the upper bound leads to an upper limit of 70 km/sec per Mpc for the Hubble constant. Evidence concerning the mass of astrophysical systems of scales from binary galaxies to large clusters of galaxies is then reviewed, and it is found that nucleons can account for all the mass on scales up to, but not including, the large galactic clusters. Relic neutrinos of mass between 3 and 10 eV are then shown to be capable of accounting for this mass and thereby supplying the dominant contribution to the mass in the universe. Testable predictions of the present hypothesis include the discovery of neutrino oscillations, and neutrinos of speed less than the speed of light.
Schramm David N.
Steigman Gary
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