Cosmic-Ray Positrons Produced by Pulsar Winds from Mature Gamma-Ray Pulsars

Details Cosmic-Ray Positrons Produced by Pulsar Winds from Mature Gamma-Ray Pulsars Cosmic-Ray Positrons Produced by Pulsar Winds from Mature Gamma-Ray Pulsars

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001chphl..18..701z&link_type=abstract

Chinese Physics Letters, Volume 18, Issue 5, pp. 701-704 (2001).

Physics

1

Scientific paper

In the frame of the γ-ray pulsar outer gap model, e+/- pairs in the pulsar magnetosphere are produced by the cascade of e+/- pairs through synchrotron radiation of the return current from the outer gap. These pairs are accelerated mono-energetically to relativistic energies in the pulsar wind driven by low-frequency electromagnetic waves. Using Monte Carlo simulations, we generate a sample of the mature γ-ray pulsars in our Galaxy and calculate the positron production rate from these pulsars. With a simple leaky box model, we calculate the ratio of cosmic-ray positron to total electrons. Our result indicates that the pulsar contribution to the cosmic-ray positron peaks at about 40 GeV and the observed e+/(e- + e+) ratio can be explained by this model.

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