UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Detection of Cross-Correlation between Gravitational Lensing and gamma Rays

Ammazzalorso, S; Gruen, D; Regis, M; Camera, S; Ando, S; Fornengo, N; Bechtol, K; ... Zhang, Y; + view all (2020) Detection of Cross-Correlation between Gravitational Lensing and gamma Rays. Physical Review Letters , 124 (10) , Article 101102. 10.1103/PhysRevLett.124.101102. Green open access

[img]
Preview
Text
PhysRevLett.124.101102.pdf - Published version

Download (2MB) | Preview

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 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.

Type: Article
Title: Detection of Cross-Correlation between Gravitational Lensing and gamma Rays
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.124.101102
Publisher version: https://doi.org/10.1103/PhysRevLett.124.101102
Language: English
Additional information: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10094453
Downloads since deposit
6Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item