High energy neutrinos from novae in symbiotic binaries: The case of V407 Cygni

Detection of high-energy (?100MeV) γ rays by the Fermi Large Area Telescope from a nova in the symbiotic binary system V407 Cygni has opened the possibility of high-energy neutrino detection from this type of source. A thermonuclear explosion on the white dwarf surface sets off a nova shell in motion that expands and slows down in a dense surrounding medium provided by the red giant companion. Particles are accelerated in the shocks of the shell and interact with the surrounding medium to produce observed γ rays. We show that proton-proton interaction, which is most likely responsible for producing γ rays via neutral pion decay, produces ?0.1GeV neutrinos that can be detected by the current and future experiments at ?10GeV.