Data di Pubblicazione:
2012
Abstract:
It is well established that phenomenological two-zone diffusion models of the galactic halo can very well reproduce cosmic-ray nuclear data and the observed antiproton flux. Here, we consider lepton propagation in such models and compute the expected galactic population of electrons, as well as the diffuse synchrotron emission that results from their interaction with galactic magnetic fields. We find models in agreement not only with cosmic ray data but also with radio surveys at essentially all frequencies. Requiring such a globally consistent description strongly disfavors very large (L15 kpc) and, even stronger, small (L1 kpc) effective diffusive halo sizes. This has profound implications for, e.g., indirect dark matter searches.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
cosmic ray theory; dark matter theory
Elenco autori:
Torsten Bringmann; Fiorenza Donato; Roberto A. Lineros
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