Galactic Neutrinos in the TeV to PeV Range

Abstract

We study the contribution of Galactic sources to the flux of astrophysical neutrinos recently observed by the IceCube Collaboration. We show that in the simplest model of homogeneous and isotropic cosmic ray diffusion in the Milky Way the Galactic diffuse neutrino emission consistent with $\gamma$-ray (Fermi-LAT) and cosmic ray data (KASCADE, KASCADE-Grande and CREAM) is expected to account for only $4\%-8\%$ of the IceCube flux above 60 TeV. Direct neutrino emission from cosmic ray-gas ($pp$) interactions in the sources would require an unusually large average opacity above 0.01. On the other hand, we find that the IceCube events already probe Galactic neutrino scenarios via the distribution of event arrival directions. Based on the latter, we show that most Galactic scenarios can only have a limited contribution to the astrophysical signal: diffuse Galactic emission ($\lesssim 50\%$), quasi-diffuse emission of neutrino sources ($\lesssim 65\%$), extended diffuse emission from the Fermi Bubbles ($\lesssim 25\%$) or unidentified TeV $\gamma$-ray sources ($\lesssim 25\%$). The arguments discussed here leave, at present, dark matter decay unconstrained.

34 pages, 13 figures, 1 table; final version in PRD

References in corpus (40)

• Giant Gamma-ray Bubbles from Fermi-LAT: AGN Activity or Bipolar Galactic Wind?
• Detection of the Characteristic Pion-Decay Signature in Supernova Remnants
• The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
• Calculation of atmospheric neutrino flux using the interaction model calibrated with atmospheric muon data
• Cosmic-Ray Proton and Helium Spectra from the First CREAM Flight
• The Spectrum and Morphology of the Fermi Bubbles
• Prompt neutrino fluxes from atmospheric charm
• TeV Gamma-Ray Sources from a Survey of the Galactic Plane with Milagro
• The Fermi Bubbles: Giant, Multi-Billion-Year-Old Reservoirs of Galactic Center Cosmic Rays
• Methods for point source analysis in high energy neutrino telescopes
• Flavor Ratio of Astrophysical Neutrinos above 35 TeV in IceCube
• The gamma-ray and neutrino sky: A consistent picture of Fermi-LAT, Milagro, and IceCube results
• Coherent Propagation of PeV Neutrinos and the Dip in the Neutrino Spectrum at IceCube
• Testing the Dark Matter Scenario for PeV Neutrinos Observed in IceCube
• Are both BL Lacs and pulsar wind nebulae the astrophysical counterparts of IceCube neutrino events?
• Neutrino Decays over Cosmological Distances and the Implications for Neutrino Telescopes
• A Galactic Halo Origin of the Neutrinos Detected by IceCube
• Spectral analysis of the high-energy IceCube neutrinos
• A generalized self-veto probability for atmospheric neutrinos
• IceCube events and decaying dark matter: hints and constraints
• Which is the flavor of cosmic neutrinos seen by IceCube?
• Glashow resonance as a window into cosmic neutrino sources
• Monochromatic neutrinos generated by dark matter and the see-saw mechanism
• Possible Interpretations of IceCube High-Energy Neutrino Events
• The Sensitivity of HAWC to High-Mass Dark Matter Annihilations
• Neutrino yield from Galactic cosmic rays
• Spiral Arms as Cosmic Ray Source Distributions
• Neutrino Portal Dark Matter: From Dwarf Galaxies to IceCube
• Investigating the TeV Morphology of MGRO J1908+06 with VERITAS
• Cosmological Implications of High-Energy Neutrino Emission from the Decay of Long-Lived Particle
• Diffuse Gamma Rays from the Galactic Plane: Probing the "GeV Excess" and Identifying the "TeV Excess"
• Neutrino Lighthouse at Sagittarius A*
• Probing deviations from tri-bimaximal mixing through ultra high energy neutrino signals
• Estimating the contribution of Galactic sources to the diffuse neutrino flux
• A multi-messenger study of the Fermi Bubbles: very high energy gamma rays and neutrinos
• Fluxes of Atmospheric Leptons at 600 GeV - 60 TeV
• High energy neutrino telescopes as a probe of the neutrino mass mechanism
• On the Contribution of "Fresh" Cosmic Rays to the Excesses of Secondary Particles
• Production of Neutrinos and Secondary Electrons in Cosmic Sources
• Cosmic Ray Energy Spectrum from Measurements of Air Showers

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• The gamma-ray and neutrino sky: A consistent picture of Fermi-LAT, Milagro, and IceCube results
• Evidence against star-forming galaxies as the dominant source of IceCube neutrinos
• Testing decay of astrophysical neutrinos with incomplete information
• Invisible Neutrino Decay Resolves IceCube's Track and Cascade Tension
• Evidence for the Galactic contribution to the IceCube astrophysical neutrino flux
• Imaging Galactic Dark Matter with High-Energy Cosmic Neutrinos
• Primordial Extremal Black Holes as Dark Matter
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• Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor
• First combined search for neutrino point-sources in the Southern Hemisphere with the ANTARES and IceCube neutrino telescopes
• Bounds on secret neutrino interactions from high-energy astrophysical neutrinos
• Probing Particle Physics with IceCube
• Point-source and diffuse high-energy neutrino emission from Type IIn supernovae
• New Constraints on all flavour Galactic diffuse neutrino emission with the ANTARES telescope
• IceCube Events from Heavy DM decays through the Right-handed Neutrino Portal
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• Galactic diffuse gamma rays meet the PeV frontier
• Visible Decay of Astrophysical Neutrinos at IceCube
• Snowmass2021 Cosmic Frontier White Paper: Ultraheavy particle dark matter
• Constraints on the neutrino emission from the Galactic Ridge with the ANTARES telescope
• High-energy neutrinos from sources in clusters of galaxies
• The Galactic Contribution to IceCube's Astrophysical Neutrino Flux
• Prospects for Detecting Galactic Sources of Cosmic Neutrinos with IceCube: An Update
• Neutrinos and Cosmic Rays Observed by IceCube
• Ultra-High-Energy Tau Neutrino Cross Sections with GRAND and POEMMA
• Expectations for high energy diffuse galactic neutrinos for different cosmic ray distributions
• Galactic and extragalactic contributions to the astrophysical muon neutrino signal
• Where are Milky Way's Hadronic PeVatrons?
• Probing galactic cosmic ray distribution with TeV gamma-ray sky
• AGILE detection of gamma-ray sources coincident with cosmic neutrino events
• Galactic gamma-ray and neutrino emission from interacting cosmic-ray nuclei
• IceCube and HAWC constraints on very-high-energy emission from the Fermi bubbles
• Toward the ultimate reach of current imaging atmospheric Cherenkov telescopes and their sensitivity to TeV dark matter
• Probing dark matter signals in neutrino telescopes through angular power spectrum
• Fluxes of diffuse gamma rays and neutrinos from cosmic-ray interactions with circumgalactic gas
• Prospects for detection of a Galactic diffuse neutrino flux
• IceCube's astrophysical neutrino energy spectrum from CPT violation
• Search for PeV Gamma-Ray Emission from the Southern Hemisphere with 5 Years of Data from the IceCube Observatory
• A DECam Search for Explosive Optical Transients Associated with IceCube Neutrinos
• Galactic Diffuse Neutrino Emission from Sources beyond the Discovery Horizon
• Bump-hunting in the diffuse flux of high-energy cosmic neutrinos
• Searches for Neutrinos from LHAASO ultra-high-energy γ-ray sources using the IceCube Neutrino Observatory
• Identifying Galactic Sources of High-Energy Neutrinos
• PeV Neutrino Events at IceCube from Single Top-Quark Production
• The Milky Way shines in high-energy neutrinos
• Oscillations of sterile neutrinos from dark matter decay eliminates the IceCube-Fermi tension
• Diffuse flux of galactic neutrinos and gamma rays
• One-point fluctuation analysis of IceCube neutrino events outlines a significant unassociated isotropic component and constrains the Galactic contribution
• A multi-messenger study of the total galactic high-energy neutrino emission
• Supergravity Model of Inflation and Explaining IceCube HESE Data via PeV Dark Matter Decay
• Neutrinos from the gamma-ray source eHWC J1825-134: predictions for Km${}^3$ detectors
• Constraining the pseudo-Dirac nature of neutrinos using astrophysical neutrino flavor data
• Quantum coherence in neutrino spin-flavor oscillations
• Estimatingthe Contribution of Galactic Neutrino Sources
• Challenges for Cosmic-ray Experiments
• Origin of the high energy neutrino flux at IceCube
• Supernova explosions of runaway stars and young neutron stars above the Galactic plane
• Searching for a Galactic component in the IceCube track-like neutrino events
• Multi-messenger Implications of Sub-PeV Diffuse Galactic Gamma-Ray Emission
• Neutrino Astronomy 2017
• Constraints on the origins of the Galactic neutrino flux
• On the contribution of cosmic-ray interactions in the circumgalactic gas to the observed high-energy neutrino flux
• Selected results from IceCube
• Flavor Matters, but Matter Flavors: Matter Effects on Flavor Composition of Astrophysical Neutrinos
• Estimation of Baryon Asymmetry from Dark Matter Decaying into IceCube Neutrinos
• Pushing the Energy and Cosmic Frontiers with High-Energy Astrophysical Neutrinos
• On the high-energy protons regular acceleration in the Fermi Bubbles