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Dark Matter and Synchrotron Emission from Galactic Center Radio Filaments

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arxiv 1106.5493 v2 pith:LPFLOZ2B submitted 2011-06-27 astro-ph.HE astro-ph.GAhep-ph

classification astro-ph.HEastro-ph.GAhep-ph
keywords emissioncenterdarkfilamentsgalacticmatternrfsobserved
verification ladder T0 review T1 audit T2 compute T3 formal
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The inner degrees of the Galactic center contain a large population of filamentary structures observed at radio frequencies. These so-called non-thermal radio filaments (NRFs) trace magnetic field lines and have attracted significant interest due to their hard (S_v ~ -0.1 +/- 0.4) synchrotron emission spectra. The origin of these filaments remains poorly understood. We show that the electrons and positrons created through the annihilations of a relatively light (~5-10 GeV) dark matter particle with the cross section predicted for a simple thermal relic can provide a compelling match to the intensity, spectral shape, and flux variation of the NRFs. Furthermore, the characteristics of the dark matter particle necessary to explain the synchrotron emission from the NRFs is consistent with those required to explain the excess gamma-ray emission observed from the Galactic center by the Fermi-LAT, as well as the direct detection signals observed by CoGeNT and DAMA/LIBRA.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Radio filaments as Z-pinched Galactic center wind

    astro-ph.GA 2024-12 reject novelty 6.0 of 10

    The paper proposes that Galactic center radio filaments are Z-pinched currents produced by charge-dependent magnetic deflection of the Galactic center wind.

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