Probing galactic cosmic ray distribution with TeV gamma-ray sky

Abstract

The distribution of cosmic rays in the Galaxy at energies above few TeVs is still uncertain and this affects the expectations for the diffuse gamma flux produced by hadronic interactions of cosmic rays with the interstellar gas. We show that the TeV gamma-ray sky can provide interesting constraints. Namely, we compare the flux from the galactic plane measured by Argo-YBJ, HESS, HAWC and Milagro with the expected flux due to diffuse emission and point-like and extended sources observed by HESS showing that experimental data can already discriminate among different hyphoteses for cosmic ray distribution. The constraints can be strengthened if the contribution of sources not resolved by HESS is taken into account.

References in corpus (8)

• The H.E.S.S. Galactic plane survey
• Gamma-ray sky points to radial gradients in cosmic-ray transport
• Diffuse Galactic gamma ray flux at very high energy
• Reconciling cosmic ray diffusion with Galactic magnetic field models
• A signature of anisotropic cosmic-ray transport in the gamma-ray sky
• Cosmic ray signatures of a 2-3 Myr old local supernova
• On the progressive hardening of the cosmic-ray proton spectrum in the inner Galaxy
• A multi-messenger study of the total galactic high-energy neutrino emission

Cited by in corpus (19)

• Limits on Sub-GeV Dark Matter from the PROSPECT Reactor Antineutrino Experiment
• Unresolved sources naturally contribute to PeV $\gamma$-ray diffuse emission observed by Tibet AS$\gamma$
• Simulating the Galactic Multi-messenger Emissions with HERMES
• Milky Way as a Neutrino Desert Revealed by IceCube Galactic Plane Observation
• Probing the Cosmic Ray density in the inner Galaxy
• Galactic diffuse gamma-ray emission at TeV energy
• The TeV gamma-ray luminosity of the Milky-Way and the contribution of H.E.S.S. unresolved sources to VHE diffuse emission
• The contribution of Galactic TeV pulsar wind nebulae to Fermi-LAT diffuse emission
• Sensitivity of the Cherenkov Telescope Array to TeV photon emission from the Large Magellanic Cloud
• Sensitivity of the Cherenkov Telescope Array to dark subhalos
• Cherenkov Telescope Array sensitivity to branon dark matter models
• The Steady-State Multi-TeV Diffuse Gamma-Ray Emission Predicted with GALPROP and Prospects for the Cherenkov Telescope Array
• Unveiling the nature of galactic TeV sources with IceCube results
• LHAASO protons versus LHAASO diffuse gamma-rays: a consistency check
• Setting an upper limit for the total TeV neutrino flux from the disk of our Galaxy
• The GALPROP Cosmic-ray Propagation and Non-thermal Emissions Framework: Release v57
• First constraints on axion-like particles from Galactic sub-PeV gamma rays
• Search for Diffuse Galactic Neutrinos with the Full ANTARES Telescope Dataset
• Interpreting the LHAASO Galactic diffuse emission data