Galactic gamma-ray and neutrino emission from interacting cosmic-ray nuclei

Abstract

We present a study of the expectations for very-high-energy (VHE) to ultra-high-energy (UHE) gamma-ray and neutrino emission from interacting cosmic rays in our Galaxy as well as a comparison to the latest results for the Galactic UHE diffuse emission. We demonstrate the importance of properly accounting for both the mixed cosmic-ray composition and the gamma-ray absorption. We adopt the wounded-nucleon model of nucleus interactions and provide parameterisations of the resulting gamma-ray and neutrino production. Nucleon shielding due to clustering inside nuclei is shown to have a measurable effect on the production of gamma rays and is particularly evident close to breaks and cutoffs in mixed-composition particle spectra. The change in composition around the `knee' in the cosmic ray spectrum has a noticeable impact on the diffuse neutrino and gamma-ray emission spectra. We show that current and near-future detectors can probe these differences in the key energy range from 10 TeV to 1 PeV, testing the paradigm of the universality of the cosmic ray spectrum and composition throughout the Galaxy.

arXiv comment17 pages, 12 figures, accepted for publication by A&A

References in corpus (44)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• Pre-Supernova Evolution of Massive Single and Binary Stars
• Energy spectra of gamma-rays, electrons and neutrinos produced at proton-proton interactions in the very high energy regime
• Fermi-LAT Observations of the Diffuse Gamma-Ray Emission: Implications for Cosmic Rays and the Interstellar Medium
• A New Model of the Galactic Magnetic Field
• IceCube-Gen2: The Window to the Extreme Universe
• Acceleration of petaelectronvolt protons in the Galactic Centre
• Development of the Model of Galactic Interstellar Emission for Standard Point-Source Analysis of Fermi Large Area Telescope Data
• Parametrization of gamma-ray production cross-sections for pp interactions in a broad proton energy range from the kinematic threshold to PeV energies
• Energy Spectra of Abundant Nuclei of Primary Cosmic Rays from the Data of ATIC-2 Experiment: Final Results
• The Galactic Magnetic Field
• Cosmic ray acceleration and escape from supernova remnants
• Proton and Helium Spectra from the CREAM-III Flight
• KASCADE-Grande measurements of energy spectra for elemental groups of cosmic rays
• Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC
• First Detection of sub-PeV Diffuse Gamma Rays from the Galactic Disk: Evidence for Ubiquitous Galactic Cosmic Rays beyond PeV Energies
• Spatial distribution of interstellar gas in the innermost 3 kpc of our Galaxy
• First Detection of Photons with Energy Beyond 100 TeV from an Astrophysical Source
• Energy spectra of cosmic-ray nuclei at high energies
• CRDB: a database of charged cosmic rays
• The gamma-ray and neutrino sky: A consistent picture of Fermi-LAT, Milagro, and IceCube results
• A radiation transfer model for the Milky-Way: I. Radiation fields and application to High Energy Astrophysics
• Measurement of the cosmic ray helium energy spectrum from 70 GeV to 80 TeV with the DAMPE space mission
• Cosmic Ray Spectrum and Composition from PeV to EeV Using 3 Years of Data From IceTop and IceCube
• Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data
• Constraining Very Heavy Dark Matter Using Diffuse Backgrounds of Neutrinos and Cascaded Gamma Rays
• Nuclear enhancement factor in calculation of Galactic diffuse gamma-rays: A new estimate with DPMJET-3
• Diffuse Galactic gamma ray flux at very high energy
• Galactic Neutrinos in the TeV to PeV Range
• Joint constraints on Galactic diffuse neutrino emission from ANTARES and IceCube
• Study of the diffuse gamma-ray emission from the Galactic plane with ARGO-YBJ
• High-energy particles and radiation in star-forming regions
• The shape of the cosmic ray proton spectrum
• Core collapse supernovae as Cosmic Ray sources
• Cosmic-ray database update: ultra-high energy, ultra-heavy, and anti-nuclei cosmic-ray data (CRDB v4.0)
• Nuclear enhancement of the photon yield in cosmic ray interactions
• Evidence that Ultra-High-Energy Gamma Rays are a Universal Feature Near Powerful Pulsars
• Wounded nucleon model with realistic nucleon-nucleon collision profile and observables in relativistic heavy-ion collisions
• Ultra-high energy Inverse Compton emission from Galactic electron accelerators
• On the shape of the gamma-ray spectrum around the "${\pi }^0$-bump"
• Origin of Galactic sub-PeV diffuse gamma-ray emission: Constraints from high-energy neutrino observations
• First implications of Tibet AS${}_{\gamma }$ data for heavy dark matter
• Pion decay model of TIBET-AS$\gamma$ PeV gamma-ray signal

Cited by in corpus (9)

• Measurement of ultra-high-energy diffuse gamma-ray emission of the Galactic plane from 10 TeV to 1 PeV with LHAASO-KM2A
• Galactic diffuse gamma rays meet the PeV frontier
• A deep spectromorphological study of the $\gamma$-ray emission surrounding the young massive stellar cluster Westerlund 1
• Probing the Particle Spectrum of Nature with Evaporating Black Holes
• Diffuse Emission of Galactic High-Energy Neutrinos from a Global Fit of Cosmic Rays
• Galactic diffuse gamma-ray emission from GeV to PeV energies in light of up-to-date cosmic ray measurements
• Where are Milky Way's Hadronic PeVatrons?
• Massive Star Clusters as sources of high-energy gamma radiation
• Selected results from IceCube