Particle dark matter is under deep scrutiny in both direct and indirect searches. An extensive, complex and interrelated network of astrophysical signals, which cover the whole electromagnetic spectrum (from radio to gamma rays) and comprise exotic components in cosmic rays (positrons, antiprotons, antideuterons) is exploited in order to identify a non-gravitational signal of dark matter, able to pinpoint its particle physics nature. Among the various possibilities, this short note discusses a recent proposal: the cross-correlation of the gamma-rays signal with weak gravitational lensing observables, specifically the small distortion of background galaxies measured by the cosmic shear.
MULTIWAVELENGTH AND MULTIMESSENGER SIGNALS OF DARK MATTER
FORNENGO, Nicolao
2015-01-01
Abstract
Particle dark matter is under deep scrutiny in both direct and indirect searches. An extensive, complex and interrelated network of astrophysical signals, which cover the whole electromagnetic spectrum (from radio to gamma rays) and comprise exotic components in cosmic rays (positrons, antiprotons, antideuterons) is exploited in order to identify a non-gravitational signal of dark matter, able to pinpoint its particle physics nature. Among the various possibilities, this short note discusses a recent proposal: the cross-correlation of the gamma-rays signal with weak gravitational lensing observables, specifically the small distortion of background galaxies measured by the cosmic shear.
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