6533b872fe1ef96bd12d3094
RESEARCH PRODUCT
Radio data and synchrotron emission in consistent cosmic ray models
Roberto A. LinerosTorsten BringmannFiorenza Donatosubject
Cosmology and Nongalactic Astrophysics (astro-ph.CO)Astrophysics::High Energy Astrophysical PhenomenaPopulationDark matterFOS: Physical sciencesSynchrotron radiationCosmic rayAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics01 natural sciencesGalactic haloHigh Energy Physics - Phenomenology (hep-ph)0103 physical scienceseducation010303 astronomy & astrophysicsAstrophysics::Galaxy AstrophysicsPhysicseducation.field_of_studydark matter theorycosmic ray theory; dark matter theory010308 nuclear & particles physicsAstronomy and Astrophysicscosmic ray theoryAstrophysics - Astrophysics of GalaxiesHigh Energy Physics - PhenomenologyAntiprotonAstrophysics of Galaxies (astro-ph.GA)HaloAstrophysics - Cosmology and Nongalactic AstrophysicsRadio wavedescription
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 ($L\gtrsim 15$ kpc) and, even stronger, small ($L\lesssim 1$ kpc) effective diffusive halo sizes. This has profound implications for, e.g., indirect dark matter searches.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-06-23 | Journal of Cosmology and Astroparticle Physics |