A consistent interpretation of recent CR nuclei and electron spectra

Details A consistent interpretation of recent CR nuclei and electron spectra A consistent interpretation of recent CR nuclei and electron spectra

2011-01-10

arxiv.org/abs/1101.1830v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

Accepted for the publication in the proceedings of the ICATPP Conference on Cosmic Rays for Particle and Astroparticle Physics

Scientific paper

We try to interpret the recently updated measurement of the cosmic ray electron (CRE) spectrum observed by Fermi-LAT, together with PAMELA data on positron fraction, in a single-component scenario adopting different propagation setups; we find that the model is not adequate to reproduce the two datasets, so the evidence of an extra primary component of electrons and positrons is strengthened. Instead, a double component scenario computed in a Kraichnan-like diffusion setup (which is suggested by B/C and $\bar{p}$ data) gives a satisfactory fit of all exisiting measurements. We confirm that nearby pulsars are good source candidates for the required $e^\pm$ extra-component and we show that the predicted CRE anisotropy in our scenario is compatible with Fermi-LAT recently published constraints.

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