Signatures of middle aged, nearby pulsars in the cosmic ray lepton spectrum?

Details Signatures of middle aged, nearby pulsars in the cosmic ray lepton spectrum? Signatures of middle aged, nearby pulsars in the cosmic ray lepton spectrum?

2011-09-27

arxiv.org/abs/1109.5964v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

6 pages, accepted for the publication in the proceedings of the ICATPP Conference on Cosmic Rays for Particle and Astroparticl

Scientific paper

Recent data reported by the PAMELA and ATIC experiments, as well as cosmic ray lepton results from FERMI and H.E.S.S. collaborations sparked a series of papers explaining these results either by contributions of electron positron pairs to the local interstellar cosmic ray (CR) spectrum by dark matter (DM) or pulsars. Focusing here on pulsars, we argue that at the present, our knowledge about particle acceleration at pulsars as well as of the local Galactic CR propagation is still limited, i.e. the recent results for CR electrons and positrons constrain pulsar and propagation models. We will thus not present another attempt to explain the data by contributions of pulsars to the local CR lepton flux but rather to highlight the caveats in doing so.

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