PT Journal
AU Bringmann, T
   Donato, F
   Lineros, RA
TI Radio data and synchrotron emission in consistent cosmic ray models
SO Journal of Cosmology and Astroparticle Physics
JI J. Cosmol. Astropart. Phys.
PY 2012
BP 049
EP 12pp
VL 01
IS 1
DI 10.1088/1475-7516/2012/01/049
LA English
DE cosmic ray theory; dark matter theory
AB 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 (L greater than or similar to 15 kpc) and, even stronger, small (L less than or similar to 1 kpc) effective diffusive halo sizes. This has profound implications for, e.g., in direct dark matter searches.
ER