Implications of Fermi-LAT observations on the origin of IceCube neutrinos

Abstract

The IceCube (IC) collaboration recently reported the detection of TeV-PeV extraterrestrial neutrinos whose origin is yet unknown. By the photon-neutrino connection in $pp$ and $p\gamma$ interactions, we use the \fermi-LAT observations to constrain the origin of the IC detected neutrinos. We find that Galactic origins, i.e., the diffuse Galactic neutrinos due to cosmic ray (CR) propagation in the Milky Way, and the neutrinos from the Galactic point sources, may not produce the IC neutrino flux, thus these neutrinos should be of extragalactic origin. Moreover, the extragalactic gamma-ray bursts (GRBs) may not account for the IC neutrino flux, the jets of active galactic nuclei may not produce the IC neutrino spectrum, but the starburst galaxies (SBGs) may be promising sources. As suggested by the consistency between the IC detected neutrino flux and the Waxman-Bahcall bound, GRBs in SBGs may be the sources of both the ultrahigh energy, $>10^{19}$eV, CRs and the $1-100$~PeV CRs that produce the IC detected TeV-PeV neutrinos.

JCAP accepted version; 8 pages, 2 figs; discussion on blazar origin added; conclusion unchanged

References in corpus (2)

• Star-forming galaxies as the origin of diffuse high-energy backgrounds: Gamma-ray and neutrino connections, and implications for starburst history
• A Galactic Halo Origin of the Neutrinos Detected by IceCube

Cited by in corpus (6)

• Spectral analysis of the high-energy IceCube neutrinos
• Star-forming galaxies as the origin of the IceCube PeV neutrinos
• High-energy emitting BL Lacs and high-energy neutrinos - Prospects for the direct association with IceCube and KM3NeT
• Constraints on cosmic ray loading and PeV neutrino production in blazars
• Search for GeV and X-ray flares associated with the IceCube track-like neutrinos
• Neutrinos from gamma-ray bursts: propagation of cosmic rays in their host galaxies