On the stochastic nature of Galactic cosmic-ray sources
arXiv:2111.01171 · doi:10.1103/PhysRevD.104.123029
Abstract
The precision measurements of the spectra of cosmic ray nuclei and leptons in recent years have revealed the existence of multiple features, such as the spectral break at GV rigidity seen by PAMELA and AMS-02 and more recently confirmed by DAMPE and CALET, the softening in the spectra of H and He nuclei at TV reported by DAMPE, confirming previous hints by NUCLEON and CREAM, a tiny change of slope at GeV in the electron spectrum, revealed by AMS-02, and the large spectral break at TeV reported by indirect (HESS, MAGIC and VERITAS) and direct (DAMPE, CALET) measurements of the total (electrons+positrons) lepton spectrum. In all these cases, the possibility has been suggested that these features might reflect the occasional presence of a local cosmic ray source, inducing a noticeable reshaping of the average expected spectra. All these proposals have to face the question of how likely it is for such a source to exist, a question that we address here in a quantitative way. We study the statistical properties of random distribution of sources in space and time, and the effect of the spiral structure of our Galaxy for both the spectra of light nuclei (p and He) and leptons (electrons and positrons) in different energy regions.
arXiv comment20 pages, 13 figures, accepted for publication in PRD
References in corpus (87)
- Cosmic-ray propagation and interactions in the Galaxy
- Propagation of cosmic-ray nucleons in the Galaxy
- The Interstellar Environment of our Galaxy
- PAMELA Measurements of Cosmic-ray Proton and Helium Spectra
- Production and propagation of cosmic-ray positrons and electrons
- Birth and Evolution of Isolated Radio Pulsars
- KASCADE measurements of energy spectra for elemental groups of cosmic rays: Results and open problems
- The Parkes multibeam pulsar survey: VI. Discovery and timing of 142 pulsars and a Galactic population analysis
- Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons
- Pulsars as the Sources of High Energy Cosmic Ray Positrons
- Probing the ATIC peak in the cosmic-ray electron spectrum with H.E.S.S
- Supernova remnants: the X-ray perspective
- Parametrization of gamma-ray production cross-sections for pp interactions in a broad proton energy range from the kinematic threshold to PeV energies
- The cosmic-ray electron flux measured by the PAMELA experiment between 1 and 625 GeV
- TeV Gamma Rays from Geminga and the Origin of the GeV Positron Excess
- Cosmic-Ray Nuclei, Antiprotons and Gamma-rays in the Galaxy: a New Diffusion Model
- The cosmic-ray positron energy spectrum measured by PAMELA
- Proton and Helium Spectra from the CREAM-III Flight
- Spectral breaks as a signature of cosmic ray induced turbulence in the Galaxy
- On possible interpretations of the high energy electron-positron spectrum measured by the Fermi Large Area Telescope
- A Census of High-Energy Observations of Galactic Supernova Remnants
- Magnetars in the Metagalaxy: An Origin for Ultra High Energy Cosmic Rays in the Nearby Universe
- Analytical solutions for energy spectra of electrons accelerated by nonrelativistic shock-waves in shell type supernova remnants
- The Most Likely Sources of High Energy Cosmic-Ray Electrons in Supernova Remnants
- Cosmic-ray electron+positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope
- Origin of the Cosmic Ray Spectral Hardening
- Direct Measurement of the Cosmic-Ray Proton Spectrum from 50 GeV to 10 TeV with the Calorimetric Electron Telescope on the International Space Station
- Extended Measurement of the Cosmic-Ray Electron and Positron Spectrum from 11 GeV to 4.8 TeV with the Calorimetric Electron Telescope on the International Space Station
- Diffusive propagation of cosmic rays from supernova remnants in the Galaxy. II: anisotropy
- Probing the Pulsar Origin of the Anomalous Positron Fraction with AMS-02 and Atmospheric Cherenkov Telescopes
- Galactic electrons and positrons at the Earth:new estimate of the primary and secondary fluxes
- Cosmic Ray Transport in the Galaxy: a Review
- 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
- Diffusive propagation of cosmic rays from supernova remnants in the Galaxy. I: spectrum and chemical composition
- Interpretation of AMS-02 electrons and positrons data
- On the rate of core collapse supernovae in the Milky Way
- Galactic cosmic rays after the AMS-02 observations
- Large-Scale Sidereal Anisotropy of Galactic Cosmic-Ray Intensity Observed by the Tibet Air Shower Array
- AMS-02 beryllium data and its implication for cosmic ray transport
- Current status and desired accuracy of the isotopic production cross sections relevant to astrophysics of cosmic rays I. Li, Be, B, C, N
- Spectra of Cosmic Ray Protons and Helium Produced in Supernova Remnants
- Indications for a high-rigidity break in the cosmic-ray diffusion coefficient
- Signatures of a two million year old supernova in the spectra of cosmic ray protons, antiprotons and positrons
- Is the PAMELA anomaly caused by the supernova explosions near the Earth?
- Origin of the Cosmic Ray Galactic Halo Driven by Advected Turbulence and Self-Generated Waves
- Three-Dimensional Model of Cosmic-Ray Lepton Propagation Reproduces Data from the Alpha Magnetic Spectrometer on the International Space Station
- Pulsar wind nebulae with bow shocks: non-thermal radiation and cosmic ray leptons
- Searches for Cosmic-Ray Electron Anisotropies with the Fermi Large Area Telescope
- Pulsar interpretation for the AMS-02 result
- Deciphering the Dipole Anisotropy of Galactic Cosmic Rays
- A new look at the cosmic ray positron fraction
- Nearby supernova remnants and the cosmic-ray spectral hardening at high energies
- Cosmic-ray propagation with DRAGON2: II. Nuclear interactions with the interstellar gas
- Galactic factories of cosmic-ray electrons and positrons
- Implications of the AMS-02 positron fraction in cosmic rays
- Galactic halo size in the light of recent AMS-02 data
- Constraining Galactic cosmic-ray parameters with Z<=2 nuclei
- Combined analysis of AMS-02 (Li,Be,B)/C, N/O, 3He, and 4He data
- Solution to the cosmic ray anisotropy problem
- Contribution of pulsars to cosmic-ray positrons in light of recent observation of inverse-Compton halos
- Understanding TeV-band cosmic-ray anisotropy
- Measurement of Cosmic-ray Electrons at TeV Energies by VERITAS
- The fate of ultrahigh energy nuclei in the immediate environment of young fast-rotating pulsars
- Shock acceleration of electrons in the presence of synchrotron losses: I. test particle theory
- Implications of Lithium to Oxygen AMS-02 spectra on our understanding of cosmic-ray diffusion
- Dipole anisotropy in cosmic electrons and positrons: inspection on local sources
- Observation of Anisotropy of TeV Cosmic Rays with Two Years of HAWC
- Cosmic ray electrons and positrons from discrete stochastic sources
- On the Spectrum of Electrons Accelerated in Supernova Remnants
- Stochastic cosmic ray sources and the TeV break in the all-electron spectrum
- Stochastic Fluctuations of Low-Energy Cosmic Rays and the Interpretation of Voyager Data
- Klein-Nishina effect and the cosmic ray electron spectrum
- Features in cosmic-ray lepton data unveil the properties of nearby cosmic accelerators
- Studying the Milky Way Pulsar Population with Cosmic-Ray Leptons
- Galactic Cosmic-Ray Anisotropy in the Northern hemisphere from the ARGO-YBJ Experiment during 2008-2012
- Stable laws and cosmic ray physics
- Variance of the Galactic nuclei cosmic ray flux
- Signature of Energy Losses on the Cosmic Ray Electron Spectrum
- The TeV Cosmic Ray Bump: a Message from Epsilon Indi or Epsilon Eridani Star?
- Examination of uncertainties in nuclear data for cosmic ray physics with the AMS experiment
- Undiscovered pulsar in the Local Bubble as an explanation of the local high energy cosmic ray all-electron spectrum
- Intermediate mass and heavy Galactic cosmic-ray nuclei: the case of new AMS-02 measurements
- Cosmic-ray electrons released by supernova remnants
- Gamma rays from reaccelerated particles at supernova remnant shocks
- Non-linear acceleration at supernova remnant shocks and the hardening in the cosmic ray spectrum