Galactic positrons and electrons from astrophysical sources and dark matter

Abstract

A very interesting puzzle about the origin of electron and positron cosmic rays is deduced from the latests experimental results. We model the propagation of such cosmic rays in terms of a successfully tested two--zone propagation model. Several theoretical uncertainties -- like ones related to propagation -- are considered to study different types of electron and positron sources: dark matter annihilation, secondary production, and supernova remnants.

3 pages, 1 figure. Proceedings for conference "Topics in Astroparticle and Underground Physics" (TAUP2009). Rome, July 1-5, 2009

References in corpus (6)

• Observation of an anomalous positron abundance in the cosmic radiation
• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
• The energy spectrum of cosmic-ray electrons at TeV energies
• Positrons from dark matter annihilation in the galactic halo: theoretical uncertainties
• Galactic secondary positron flux at the Earth
• Study of positrons from cosmic rays interactions and cold dark matter annihilations in the galactic environment