Features in the spectrum of cosmic-ray positrons from pulsars

  title={Features in the spectrum of cosmic-ray positrons from pulsars},
  author={Ilias Cholis and Tanvi Karwal and Marc Kamionkowski},
  journal={Physical Review D},
Pulsars have been invoked to explain the origin of recently observed high-energy Galactic cosmic-ray positrons. Since the positron propagation distance decreases with energy, the number of pulsars that can contribute to the observed positrons decreases from O(103) for positron energies E≳10  GeV to only a few for E≳500  GeV. Thus, if pulsars explain these positrons, the positron energy spectrum should become increasingly bumpy at higher energies. Here, we present a power-spectrum analysis that… 

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