publication . Other literature type . Article . 2020

Detection of Cross-Correlation between Gravitational Lensing and Rays

Ammazzalorso, S.; Gruen, D.; Regis, M.; Camera, S.; Ando, S.; Fornengo, N.; Bechtol, K.; Bridle, S. L.; Choi, A.; Eifler, T. F.; ...
Open Access
  • Published: 09 Mar 2020
  • Publisher: American Physical Society (APS)
  • Country: United Kingdom
Abstract
In 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 e...
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Subjects
arXiv: Astrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::High Energy Astrophysical PhenomenaAstrophysics::Galaxy Astrophysics
free text keywords: General Physics and Astronomy, RCUK, STFC, Gravitation, Universe, media_common.quotation_subject, media_common, Dark energy, Weak gravitational lensing, Fermi Gamma-ray Space Telescope, Physics, Astrophysics, Gravitational lens, Blazar, Dark matter
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