Galactic Centre as an efficient source of cosmic rays

Abstract

After the discovery of Fermi Bubbles and the excess of gamma-ray emission, the Galactic Centre has received increasing attention with the aim to understand its role in the origin and acceleration of primary cosmic rays (CRs). Based on a diffusion/re-acceleration model, we use the GALPROP software to solve the diffusion equation for the cosmic rays and compare the results with the CRs spectrum, motivated by relationship between several energetic sources at the Galactic Centre and the generated diffuse GeV-TeV gamma-rays. We calculate the cosmic ray distribution, gamma-ray flux from Galactic Centre and explore its contribution on the spectrum and chemical composition of cosmic rays observed at Earth. We also discuss the effects of nuclei interactions with different interstellar gas models.

11 pages, 6 figures

References in corpus (47)

• Cosmic-ray propagation and interactions in the Galaxy
• Propagation of cosmic-ray nucleons in the Galaxy
• Design Concepts for the Cherenkov Telescope Array
• Production and propagation of cosmic-ray positrons and electrons
• Fermi-LAT Observations of the Diffuse Gamma-Ray Emission: Implications for Cosmic Rays and the Interstellar Medium
• Diffuse continuum gamma rays from the Galaxy
• Particle acceleration by ultra-relativistic shocks: theory and simulations
• A common mass scale for satellite galaxies of the Milky Way
• Acceleration of petaelectronvolt protons in the Galactic Centre
• The Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter
• Background model systematics for the Fermi GeV excess
• The Fermi Galactic Center GeV Excess and Implications for Dark Matter
• Proton and Helium Spectra from the CREAM-III Flight
• The Fermi Bubbles: Giant, Multi-Billion-Year-Old Reservoirs of Galactic Center Cosmic Rays
• Cosmic-ray propagation with DRAGON2: I. numerical solver and astrophysical ingredients
• CRDB: a database of charged cosmic rays
• Measurement of boron and carbon fluxes in cosmic rays with the PAMELA experiment
• Cosmic Ray Protons in the Inner Galaxy and the Galactic Center Gamma-Ray Excess
• Galactic Center gamma-ray "excess" from an active past of the Galactic Centre?
• Cosmic-ray energy spectrum and composition up to the ankle - the case for a second Galactic component
• Energy spectra of primary and secondary cosmic-ray nuclei measured with TRACER
• Bayesian analysis of spatial-dependent cosmic-ray propagation: astrophysical background of antiprotons and positrons
• The origin of cosmic rays: Explosions of massive stars with magnetic winds and their supernova mechanism
• The Fermi Bubbles as Starburst Wind Termination Shocks
• The Three-Dimensional Spatial Distribution of Interstellar Gas in the Milky Way: Implications for Cosmic Rays and High-Energy Gamma-Ray Emissions
• A hidden friend for the galactic center black hole, Sgr A*
• Theoretical uncertainties in extracting cosmic-ray diffusion parameters: the boron-to-carbon ratio
• Major structures of the inner Galaxy delineated by 6.7-GHz methanol masers
• X-ray and Gamma-ray Observations of the Fermi Bubbles and NPS/Loop I Structures
• The boron-to-carbon abundance ratio and Galactic propagation of cosmic radiation
• The Connection Between the Positron Fraction Anomaly and the Spectral Features in Galactic Cosmic-Ray Hadrons
• Improved Cosmic-Ray Injection Models and the Galactic Center Gamma-Ray Excess
• Spectral Intensities of Antiprotons and the lifetime of Cosmic Rays in the Galaxy
• Search for Very High Energy Gamma Rays from the Northern $\text{Fermi}$ Bubble Region with HAWC
• The Fermi Bubble as a Source of Cosmic Rays in the Energy Range > 10E15 eV
• Putting Things Back Where They Belong: Tracing Cosmic-Ray Injection with H2
• Sagittarius A* as an Origin of the Galactic PeV Cosmic Rays?
• The Fifth Candidate for an Intermediate-mass Black Hole in the Galactic Center
• An upper limit on the cosmic-ray luminosity of individual sources from gamma-ray observations
• Pevatron at the Galactic Center: Multi-Wavelength Signatures from Millisecond Pulsars
• IceCube and HAWC constraints on very-high-energy emission from the Fermi bubbles
• Upper limits on the total cosmic-ray luminosity of individual sources
• Contribution of the Galactic center to the local cosmic-ray flux
• Two Numerical Methods for the 3D Anisotropic Propagation of Galactic Cosmic Rays
• On the Galactic Center Being the Main Source of Galactic Cosmic Rays as Evidenced by Recent Cosmic Ray and Gamma Ray Observations
• Cosmic rays escaping from Galactic starburst-driven superbubbles
• Relative abundances of cosmic ray nuclei B-C-N-O in the energy region from 10 GeV/n to 300 GeV/n. Results from ATIC-2 (the science flight of ATIC)

Cited by in corpus (4)

• New Constraints on Cosmic Particle Populations at the Galactic Center using X-ray Observations of the Molecular Cloud Sagittarius B2
• High-energy gamma-ray emission from SNR G57.2+0.8 hosting SGR J1935+2154
• Cosmic-ray propagation under consideration of a spatially resolved source distribution
• Bayesian WIMP detection with the Cherenkov Telescope Array