The diffuse gamma-ray flux associated with sub-PeV/PeV neutrinos from starburst galaxies

Abstract

One attractive scenario for the excess of sub-PeV/PeV neutrinos recently reported by IceCube is that they are produced by cosmic rays in starburst galaxies colliding with the dense interstellar medium. These proton-proton ($pp$) collisions also produce high-energy gamma-rays, which finally contribute to the diffuse high-energy gamma-ray background. We calculate the diffuse gamma-ray flux with a semi-analytic approach and consider that the very high energy gamma-rays will be absorbed in the galaxies and converted into electron-position pairs, which then lose almost all their energy through synchrotron radiation in the strong magnetic fields in the starburst region. Since the synchrotron emission goes into energies below GeV, this synchrotron loss reduces the diffuse high-energy gamma-ray flux by a factor of about two, thus leaving more room for other sources to contribute to the gamma-ray background. For a $E_{\nu }^{-2}$ neutrino spectrum, we find that the diffuse gamma-ray flux contributes about 20% of the observed diffuse gamma-ray background in the 100 GeV range. However, for a steeper neutrino spectrum, this synchrotron loss effect is less important, since the energy fraction in absorbed gamma-rays becomes lower.

arXiv commentAccepted by ApJ, one figure added, small revisions in text, results and conclusions unchanged

References in corpus (41)

• The Global Schmidt Law in Star Forming Galaxies
• Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data
• Energy spectra of gamma-rays, electrons and neutrinos produced at proton-proton interactions in the very high energy regime
• High-resolution Millimeter Imaging of Submillimeter Galaxies
• The Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived From First-Year Fermi Large Area Telescope Data
• The Herschel PEP/HerMES Luminosity Function. I: Probing the Evolution of PACS selected Galaxies to z~4
• Testing the Hadronuclear Origin of PeV Neutrinos Observed with IceCube
• Constraints on cosmic-ray propagation models from a global Bayesian analysis
• TeV-PeV Neutrinos from Low-Power Gamma-Ray Burst Jets inside Stars
• The Cumulative Bakground of High-Energy Neutrinos from Starburst Galaxies
• Magnetic Fields in Starburst Galaxies and The Origin of the FIR-Radio Correlation
• Probing the Galactic Origin of the IceCube Excess with Gamma-Rays
• Dust in starburst nuclei and ULIRGs: SED models for observers
• On The GeV & TeV Detections of the Starburst Galaxies M82 & NGC 253
• Constraints on the VHE Emissivity of the Universe from the Diffuse GeV Gamma-Ray Background
• IceCube Non-detection of GRBs: Constraints on the Fireball Properties
• Ice Cube Observed PeV Neutrinos from AGN Cores
• High-energy Cosmic Rays and Neutrinos from Semi-relativistic Hypernovae
• Restricting UHECRs and cosmogenic neutrinos with Fermi-LAT
• A Galactic Halo Origin of the Neutrinos Detected by IceCube
• The Physics of the FIR-Radio Correlation: II. Synchrotron Emission as a Star-Formation Tracer in High-Redshift Galaxies
• PeV neutrinos from intergalactic interactions of cosmic rays emitted by active galactic nuclei
• Photohadronic Origin of the TeV-PeV Neutrinos Observed in IceCube
• The Galactic Center Origin of a Subset of IceCube Neutrino Events
• PeV neutrinos from interactions of cosmic rays with the interstellar medium in the Galaxy
• Spectral analysis and interpretation of the γ-ray emission from the Starburst galaxy NGC 253
• Diffuse PeV neutrinos from EeV cosmic ray sources: semi-relativistic hypernova remnants in star-forming galaxies
• Sub-PeV Neutrinos from TeV Unidentified Sources in the Galaxy
• Diffuse PeV neutrino emission from Ultra-Luminous Infrared Galaxies
• High-energy neutrinos from astrophysical accelerators of cosmic ray nuclei
• What IceCube data tell us about neutrino emission from star-forming galaxies (so far)
• Pinning down the cosmic ray source mechanism with new IceCube data
• Neutrino Events at IceCube and the Fermi Bubbles
• Klein-Nishina steps in the energy spectrum of galactic cosmic ray electrons
• Diffuse PeV neutrinos from gamma-ray bursts
• Diffuse Hard X-ray Emission in Starburst Galaxies as Synchrotron from Very High Energy Electrons
• Ultra-High Energy Cosmic Rays and the GeV-TeV Diffuse Gamma-Ray Flux
• High Energy Gamma-ray Absorption and Cascade Emission in Nearby Starburst Galaxies
• Constraining the Emissivity of Ultrahigh Energy Cosmic Rays in the Distant Universe with the Diffuse Gamma-ray Emission
• Spectrum and Composition of Ultra-high Energy Cosmic Rays from Semi-relativistic Hypernovae
• The Role of Magnetic Fields in Starburst Galaxies as Revealed by OH Megamasers

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• Tidal disruption jets of supermassive black holes as hidden sources of cosmic rays: explaining the IceCube TeV-PeV neutrinos
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• Astrophysics Uniquely Enabled by Observations of High-Energy Cosmic Neutrinos
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• Star-forming galaxies as the origin of the IceCube PeV neutrinos
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• Where do IceCube neutrinos come from? Hints from the diffuse gamma-ray flux
• Revisiting the Contributions of Supernova and Hypernova Remnants to the Diffuse High-Energy Backgrounds: Constraints on Very-High-Redshift Injections
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• Cumulative Neutrino and Gamma-Ray Backgrounds from Halo and Galaxy Mergers
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• How bright can the brightest neutrino source be?
• How far are the sources of IceCube neutrinos? Constraints from the diffuse TeV gamma-ray background
• Cosmic rays, neutrinos and GeV-TeV gamma rays from Starburst Galaxy NGC 4945
• Early Decay of Peccei-Quinn Fermion and the IceCube Neutrino Events
• Beyond first light: Global monitoring for high-energy neutrino astronomy
• Atmospheric Cherenkov Telescopes as a Potential Veto Array for Neutrino Astronomy
• Neutrino Constrains to the Diffuse Gamma-Ray Emission from Accretion Shocks