The Cumulative Bakground of High-Energy Neutrinos from Starburst Galaxies

Details The Cumulative Bakground of High-Energy Neutrinos from Starburst Galaxies The Cumulative Bakground of High-Energy Neutrinos from Starburst Galaxies

2006-01-30

arxiv.org/abs/astro-ph/0601695v2

JCAP 0605 (2006) 003

Astronomy and Astrophysics

Astrophysics

Accepted for publication in JCAP

Scientific paper

10.1088/1475-7516/2006/05/003

We show that starburst galaxies convert efficiently cosmic-rays into pions, which in turn decay into high-energy neutrinos and photons. The cumulative background of GeV neutrinos is 10^{-7}GeV/cm^2/s/sr. Its extrapolation to higher neutrino energies depends on the energy spectrum of the injected cosmic-rays and is proportional to E^{-0.15+-0.1} up to E~0.3PeV and possibly higher neutrino energies. This flux, which constitutes a lower limit to the high energy extra-Galactic neutrino flux, is likely to be detectable by forthcoming km-scale neutrino telescopes.

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