Big Bang Cosmology, Relic Neutrinos, and Absorption of Neutrino Cosmic Rays

Dec, 1983
19 pages
Published in:
  • Astrophys.J. 285 (1984) 495
Report number:
  • UCSD-10P10-233

Citations per year

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Abstract: (ADS)
The proposal to search for relic neutrinos through their absorption effect on the neutrino cosmic-ray flux is carefully examined. Resonant absorption at E(v) of about 10 to the 21st eV-squared/m(1+z), where m is the neutrino mass and z is the cosmological redshift of the neutrino source, has been previously predicted. However, it is shown that detection of the neutrino flux in the absorption region requires an improbable power output for a single source. A summation over a distribution of sources is then performed, using the quasar distribution as a model. This summation increases the neutrino flux but spreads the absorption dip. It is concluded that within the context of big bang cosmology, detection of relic neutrinos through their absorption effects depends crucially on whether or not there exist sources at large z, emitting a sufficient flux of ultraenergy neutrinos. The astrophysical conditions which allow detection appear very unlikely but not impossible.
  • ASTROPHYSICS
  • NEUTRINO: COSMIC RADIATION
  • COSMIC RADIATION: FLUX
  • FLUX: COSMIC RADIATION
  • NEUTRINO: ABSORPTION
  • ABSORPTION: NEUTRINO
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