| | |
| | |
Stat |
Members: 3643 Articles: 2'487'895 Articles rated: 2609
28 March 2024 |
|
| | | |
|
Article overview
| |
|
A 3D model of cosmic-ray lepton propagation in light of AMS-02 results | Daniele Gaggero
; Luca Maccione
; Giuseppe Di Bernardo
; Carmelo Evoli
; Dario Grasso
; | Date: |
24 Apr 2013 | Abstract: | We study the compatibility of AMS-02 data on the cosmic-ray (CR) positron
fraction with data on the CR electron and positron spectra provided by PAMELA
and Fermi-LAT. We do that in terms of a novel propagation model in which
sources are distributed in spiral arm patterns in agreement with astrophysical
observations. While former interpretations assumed an unrealistically steep
injection spectrum for astrophysical background electrons, the enhanced energy
losses experienced by CR leptons due to the larger average source distance from
Earth allow us to reproduce the data with harder injection spectra as expected
in a shock acceleration scenario. Moreover, we show that in this approach, and
accounting for AMS-02 results, the contribution of nearby accelerators to the
fluxes at very high energy can be significantly reduced, thus avoiding any
tension with anisotropy upper limits. | Source: | arXiv, 1304.6718 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser claudebot
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |