Detection of Cross-Correlation between Gravitational Lensing and γ Rays

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dc.contributor.authorAmmazzalorso, S
dc.contributor.authorGruen, D
dc.contributor.authorRegis, M
dc.date.accessioned2021-02-12T11:13:08Z
dc.date.available2021-02-12T11:13:08Z
dc.date.issued2020
dc.description.abstractIn recent years, many γ -ray sources have been identified, yet the unresolved component hosts valuable information on the faintest emission. In order to extract it, a cross-correlation with gravitational tracers of matter in the Universe has been shown to be a promising tool. We report here the first identification of a cross-correlation signal between γ rays and the distribution of mass in the Universe probed by weak gravitational lensing. We use data from the Dark Energy Survey Y1 weak lensing data and the Fermi Large Area Telescope 9-yr γ -ray data, obtaining a signal-to-noise ratio of 5.3. The signal is mostly localized at small angular scales and high γ -ray energies, with a hint of correlation at extended separation. Blazar emission is likely the origin of the small-scale effect. We investigate implications of the large-scale component in terms of astrophysical sources and particle dark matter emission.en_US
dc.identifier.citationAmmazzalorso, S., Gruen, D., Regis, M. et al. Detection of cross-correlation between gravitational lensing and γ rays. American Physical Society. Rev. Lett. 124, 101102 – 2020.https://doi.org/10.1103/PhysRevLett.124.101102en_US
dc.identifier.issn1079-7114
dc.identifier.urihttp://hdl.handle.net/10566/5915
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.subjectCross-Correlationen_US
dc.subjectGravitational Lensingen_US
dc.subjectγ Raysen_US
dc.titleDetection of Cross-Correlation between Gravitational Lensing and γ Raysen_US
dc.typeArticleen_US

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