Galactic and extragalactic contributions to the astrophysical muon neutrino signal
arXiv:1603.06733 · doi:10.1103/PhysRevD.93.123002
Abstract
Spectral and anisotropy properties of IceCube astrophysical neutrino signal reveal an evidence for a significant Galactic contribution to the neutrino flux in Southern hemisphere. We check if the Galactic contribution is detectable in the astrophysical muon neutrino flux observed from a low positive declinations region of the Northern sky. Estimating the Galactic neutrino flux in this part of the sky from gamma-ray and Southern sky neutrino data, we find that the Northern sky astrophysical muon neutrino signal shows an excess over the Galactic flux. This points to the presence of an additional hard spectrum (extragalactic or large scale Galactic halo) component of astrophysical neutrino flux. We show that the Galactic flux component should still be detectable in the muon neutrino data in a decade long IceCube exposure.
arXiv comment4 pages, 3 figures
References in corpus (22)
- The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
- Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
- Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data
- High Energy Neutrinos from Astrophysical Sources: An Upper Bound
- First observation of PeV-energy neutrinos with IceCube
- A combined maximum-likelihood analysis of the high-energy astrophysical neutrino flux measured with IceCube
- Parameterization of Gamma, e^+/- and Neutrino Spectra Produced by p-p Interaction in Astronomical Environment
- Evidence for Astrophysical Muon Neutrinos from the Northern Sky with IceCube
- Hidden Cosmic-Ray Accelerators as an Origin of TeV-PeV Cosmic Neutrinos
- Atmospheric and Astrophysical Neutrinos above 1 TeV Interacting in IceCube
- Star-forming galaxies as the origin of diffuse high-energy backgrounds: Gamma-ray and neutrino connections, and implications for starburst history
- Potential Neutrino Signals from Galactic Gamma-Ray Sources
- A Galactic Halo Origin of the Neutrinos Detected by IceCube
- Galactic Neutrinos in the TeV to PeV Range
- Evidence for the Galactic contribution to the IceCube astrophysical neutrino flux
- PeV neutrinos from interactions of cosmic rays with the interstellar medium in the Galaxy
- Which blazars are neutrino loud?
- Neutrino yield from Galactic cosmic rays
- Unified model for cosmic rays above eV and the diffuse gamma-ray and neutrino backgrounds
- Neutrinos from Extra-Large Hadron Collider in the Milky Way
- Search for Galactic disk and halo components in the arrival directions of high-energy astrophysical neutrinos
- Neutrino signal from extended Galactic sources in IceCube
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- Constraining High-Energy Cosmic Neutrino Sources: Implications and Prospects
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- Testing decay of astrophysical neutrinos with incomplete information
- Connecting blazars with ultra high energy cosmic rays and astrophysical neutrinos
- Analysis of the 4-year IceCube high-energy starting events
- Sensitivity of a proposed space-based Cerenkov astrophysical-neutrino telescope (CHANT)
- Update on decaying and annihilating heavy dark matter with the 6-year IceCube HESE data
- Galactic contribution to the high-energy neutrino flux found in track-like IceCube events
- Boosted Dark Matter and its implications for the features in IceCube HESE data
- Expectations for high energy diffuse galactic neutrinos for different cosmic ray distributions
- Evidence for a break in the spectrum of astrophysical neutrinos
- PeV photon and neutrino flares from galactic gamma-ray binaries
- High-energy neutrinos from Galactic superbubbles
- High-energy neutrinos from cosmic ray interactions in the Local Bubble
- Self-consistent model of extragalactic neutrino flux from evolving blazar population
- Cosmic ray composition measurements and cosmic ray background free gamma-ray observations with Cherenkov telescopes
- An algorithm for the reconstruction of high-energy neutrino-induced particle showers and its application to the ANTARES neutrino telescope
- Probing dark matter signals in neutrino telescopes through angular power spectrum
- Angular correlation between IceCube high-energy starting events and starburst sources
- Neutrino lighthouse powered by Sagittarius A* disk dynamo
- Probing the Galactic neutrino flux at neutrino energies above 200 TeV with the Baikal Gigaton Volume Detector
- Energy-dependent flavor ratios, cascade/track spectrum tension and high-energy neutrinos from magnetospheres of supermassive black holes
- Neutrino Astronomy 2017
- On the contribution of cosmic-ray interactions in the circumgalactic gas to the observed high-energy neutrino flux
- Model-independent search for neutrino sources with the ANTARES neutrino telescope