Pulsar interpretation for the AMS-02 result

Abstract

The AMS-02 collaboration has just published a high precision measurement of the cosmic positron fraction $e^{+}/(e^{-}+e^{+})$, which rises with energy from $\sim 5$ GeV to $\sim 350$ GeV. The result indicates the existence of primary electron/positron sources to account for the positron excess. In this work, we investigate the possibility that the nearby mature pulsars are the primary positron sources. By fitting the data we find that the positrons from a single nearby pulsar, such as Geminga or Monogem, with the spectral index $\alpha \sim 2$ can interpret the AMS-02 result. We also investigate the possibility that high energy positrons are generated by multiple known pulsars in the ATNF catalogue. Such a scenario can also fit the AMS-02 data well. Future precise measurements of fine structures in the positron spectrum would be a support to the pulsar scenario.

8 pages, 6 figures

References in corpus (15)

• Observation of an anomalous positron abundance in the cosmic radiation
• A Theory of Dark Matter
• Discrepant hardening observed in cosmic-ray elemental spectra
• The cosmic-ray electron flux measured by the PAMELA experiment between 1 and 625 GeV
• Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01
• On possible interpretations of the high energy electron-positron spectrum measured by the Fermi Large Area Telescope
• PAMELA data and leptonically decaying dark matter
• Galactic secondary positron flux at the Earth
• Pulsars versus Dark Matter Interpretation of ATIC/PAMELA
• Galactic electrons and positrons at the Earth:new estimate of the primary and secondary fluxes
• Low energy cosmic ray positron fraction explained by charge-sign dependent solar modulation
• Decaying Hidden Gauge Boson and the PAMELA and ATIC/PPB-BETS Anomalies
• Interpretation of AMS-02 Results: Correlations among Dark Matter Signals
• Discriminating the source of high-energy positrons with AMS-02
• Distinguishing Between Dark Matter and Pulsar Origins of the ATIC Electron Spectrum With Atmospheric Cherenkov Telescopes

Cited by in corpus (58)

• Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth
• An Updated Analysis of Inert Higgs Doublet Model in light of the Recent Results from LUX, PLANCK, AMS-02 and LHC
• The population of TeV pulsar wind nebulae in the H.E.S.S. Galactic Plane Survey
• Bayesian analysis of spatial-dependent cosmic-ray propagation: astrophysical background of antiprotons and positrons
• Two-zone diffusion of electrons and positrons from Geminga explains the positron anomaly
• Quantitative study of the AMS-02 electron/positron spectra: implications for the pulsar and dark matter properties
• Where do the AMS-02 anti-helium events come from?
• Status, Challenges and Directions in Indirect Dark Matter Searches
• Searching in the dark: the hunt for the dark photon
• Neutrino Mass and Dark Matter in light of recent AMS-02 results
• Dynamical Dark Matter and the Positron Excess in Light of AMS
• The Positron Puzzle
• GeV observations of the extended pulsar wind nebulae constrain the pulsar interpretations of the cosmic-ray positron excess
• Explaining the GeV antiproton/$\gamma -$ray excesses and W-boson mass anomaly in an inert two Higgs doublet model
• Dark Matter Particle Explorer observations of high-energy cosmic ray electrons plus positrons and their physical implications
• Studying the Milky Way Pulsar Population with Cosmic-Ray Leptons
• On particle acceleration and transport in plasmas in the Galaxy: theory and observations
• Constraints on dark matter annihilations from diffuse gamma-ray emission in the Galaxy
• $SU(2{)}_X$ Vector DM and Galactic Center Gamma-Ray Excess
• Indirect and direct signatures of Higgs portal decaying vector dark matter for positron excess in cosmic rays
• Imprint of Multi-component Dark Matter on AMS-02
• Searching for Vector Dark Matter by Higgs Portal at the LHC
• The `excess' of primary cosmic ray electrons
• Reanalyze the pulsar scenario to explain the cosmic positron excess considering the recent developments
• Bayesian analysis of the break in DAMPE lepton spectra
• Constraints on box-shaped cosmic ray electron feature from dark matter annihilation with the AMS-02 and DAMPE data
• Dark Matter Search in Space: Combined Analysis of Cosmic Ray Antiproton-to-Proton Flux Ratio and Positron Flux Measured by AMS-02
• Revisiting Multi-Component Dark Matter with New AMS-02 Data
• Features in the Spectrum of Cosmic-Ray Positrons from Pulsars
• Systematic study of the uncertainties in fitting the cosmic positron data by AMS-02
• Pulsar interpretation of the lepton spectra measured by AMS-02
• Freeze-in production of Fermionic Dark Matter with Pseudo-scalar and Phenomenological Aspects
• Utilizing cosmic-ray positron and electron observations to probe the averaged properties of Milky Way pulsars
• Mass of Decaying Wino from AMS-02 2014
• Ultrahigh-energy diffuse gamma-ray emission from cosmic-ray interactions with medium surrounding acceleration sources
• Implications of a possible TeV break in the cosmic-ray electron and positron flux
• Effect of the diffusion parameters on the observed gamma-ray spectrum of sources and their contribution to the local all-electron spectrum: the EDGE code
• Possible bump structure of cosmic ray electrons unveiled by AMS-02 data and its common origin along with the nuclei and positron
• Test of the superdiffusion model in the interstellar medium around the Geminga pulsar
• AMS02 positron excess from decaying fermion DM with local dark gauge symmetry
• Dark Matter 2013
• Analysis of branon dark matter and extra-dimensional models with AMS-02
• Revisiting GeV-scale annihilating dark matter with the AMS-02 positron fraction
• Interpretation of the cosmic ray positron and electron excesses with an annihilating-decaying dark matter scenario
• Constraining the slow-diffusion zone size and electron injection spectral index for the Geminga pulsar halo
• Observing Signals of Spectral Features in the Cosmic-Ray Positrons and Electrons from Milky Way Pulsars
• Examining the secondary product origin of cosmic ray positrons with the latest AMS-02 data
• Dark Matter Annihilation via Breit-Wigner Enhancement with Heavier Mediator
• Geminga contribution to the cosmic-ray positron excess according to the gamma-ray observations
• Probing the astrophysical origin of high-energy cosmic-ray electrons with Monte Carlo simulation
• Monochromatic Gamma Rays from Dark Matter Annihilation to Leptons
• Possible counterpart signal of the Fermi bubbles at the cosmic-ray positrons
• Possible spectral irregularities in the AMS-02 positron spectrum
• Multicomponent Dark Matter in the Light of CALET and DAMPE
• Constraining the Diffusion Coefficient with HAWC TeV Gamma-Ray Observations of Two Nearby Pulsar Wind Nebulae
• Anisotropic Diffusion in Pulsar Halos: Interpreting the asymmetric morphology of Geminga and Monogem halos measured by HAWC
• On the stochastic nature of Galactic cosmic-ray sources
• Pulsar Wind Nebulae as a source of the observed electron and positron excess at high energy: the case of Vela-X