Possible High-Energy Neutrinos from the Cosmic Accelerator RX J1713.7−3946

The observation of TeV γ-rays of π 0 origin from the supernova remnant RX J1713.7-3946 might have revealed the first specific site where protons are accelerated to energies typical of the main component of the cosmic rays. In this Letter, we calculate the high-energy neutrino flux associated with this source to be 40 muon-type neutrinos per squared kilometer per year. We perform the same calculations for other known sources of TeV γ-rays and show how neutrino observations can establish whether the TeV γ-rays emitted by blazars and supernova remnants are the decay products of neutral pions and thus unequivocally establish the sources as cosmic accelerators.