Dipole anisotropy in cosmic electrons and positrons: inspection on local sources

2016/11/18 by Silvia Manconi, Mattia Di Mauro, Fiorenza Donato · 3 citations
Physics and Astronomy · #Anisotropy #Astroparticle physics #Astrophysics #COSMIC cancer database #Cosmic ray #Dark Matter and Cosmic Phenomena #Dipole #Electron #Neutrino Physics Research #Nuclear physics #Particle Detector Development and Performance #Physics #Positron #Quantum mechanics #astro-ph.HE

paper · pdf · doi:10.1088/1475-7516/2017/01/006

published as JCAP 1701 (2017) no.01, 006 · 26 pages, 14 figures. Comments are welcome

arxiv created 2016/11/18 · openalex created_date 2016/11/30 · openalex publication_date 2017/01/03 · arxiv updated 2018/03/01 · openalex updated_date 2026/08/05

Abstract

The cosmic electrons and positrons have been measured with unprecedented statistics up to several hundreds GeV, thus permitting to explore the role that close single sources can have in shaping the flux at different energies. In the present analysis, we consider electrons and positrons in cosmic rays to be produced by spallations of hadron fluxes with the interstellar medium, by a smooth Supernova Remnant (SNR) population, by all the ATNF catalog pulsars, and by few discrete, local SNRs. We test several source models on the e ++ e − and e + AMS-02 flux data. For the configurations compatible with the data, we compute the dipole anisotropy in e ++ e − , e + , e + / e − from single sources. Our study includes a dedicated analysis to the Vela SNR. We show that Fermi -LAT present data on dipole anisotropy of e ++ e − start to explore some of the models for the Vela SNR selected by AMS-02 flux data. We also investigate how the observed anisotropy could result from a combination of local sources. Our analysis shows that the search of anisotropy in the lepton fluxes up to TeV energies can be an interesting tool for the inspection of properties of close SNRs, complementary to the high precision flux data.

Citations

• The Vela Pulsar’s Proper Motion and Parallax Derived from VLBI Observations
• A Cosmic-Ray Positron Anisotropy due to Two Middle-Aged, Nearby Pulsars?
• Pulsars as the sources of high energy cosmic ray positrons
• High Statistics Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–500 GeV with the Alpha Magnetic Spectrometer on the International Space Station
• First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–350 GeV
• Electron and Positron Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station
• The Evolution and Structure of Pulsar Wind Nebulae
• The ATNF Pulsar Catalogue

Cited by

• Galactic factories of cosmic-ray electrons and positrons
• Theoretical Interpretation of Pass 8 Fermi-LAT e+ + e− Data
• Gamma-ray haloes around pulsars as the key to understanding cosmic-ray transport in the Galaxy