Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1241..418b&link_type=abstract
INVISIBLE UNIVERSE: Proceedings of the Conference. AIP Conference Proceedings, Volume 1241, pp. 418-425 (2010).
Astronomy and Astrophysics
Astrophysics
Dark Matter, Intergalactic Magnetic Fields, Synchrotron Radiation, Radiofrequency Cosmic Radiation, Dark Matter, Magnetic And Electric Fields, Polarization Of Starlight, Synchrotron Radiation, Background Radiations
Scientific paper
Annihilation of Dark Matter usually produces together with gamma rays comparable amounts of electrons and positrons. The e+e- gyrating in the galactic magnetic field then produce secondary synchrotron radiation which thus provides an indirect mean to constrain the DM signal itself. To this purpose, we calculate the radio emission from the galactic halo as well as from its expected substructures and we then compare it with the measured diffuse radio background. We employ a multi-frequency approach using data in the relevant frequency range 100 MHz-100 GHz, as well as the WMAP Haze data at 23 GHz. The derived constraints are of the order <σAv> = 10-24 cm3s-1 for a DM mass mκ = 100 GeV even though sensibly depending on the astrophysical uncertainties.
Borriello Enrico
Cuoco Alessandro
Mangano Gianpiero
Miele Gennaro
Moura Celio A.
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