Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981sci...211..470w&link_type=abstract
Science, vol. 211, Jan. 30, 1981, p. 470-472.
Astronomy and Astrophysics
Astrophysics
2
Cosmic Rays, Galactic Structure, Neutrinos, Particle Mass, Universe, Big Bang Cosmology, Galactic Clusters, Galactic Evolution, Missing Mass (Astrophysics), Protons
Scientific paper
Some of the papers delivered at the 1980 Texas Symposium on Relativistic Astrophysics suggest that, contrary to accepted theory, the neutrino may have a mass, estimates of which range from 3 to 20 eV. Even the smallest mass for the neutrino is significant since, at 450 per cubic centimeter of the universe, the particle is believed to outnumber protons, neutrons, and electrons by 10 billion to 1. Massive relic neutrinos - decoupled from other particles within 1 second of the Big Bang - offer a solution to the missing mass problem, and could explain the clustering of galaxies, which is thought to have occurred as a result of the recombination of baryonic matter, existing up to that time as equilibrated plasma. Neutrinos could easily be the dominant form of matter in the universe today, forming the massive, invisible halos that keep clusters bound.
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