Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8177005 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2014 | 5 Pages |
Abstract
The detailed origin of the diffuse gamma-ray background is still unknown. However, the contribution of unresolved sources is expected to induce small-scale anisotropies in this emission, which may provide a way to identify and constrain the properties of its contributors. Recent studies have predicted the contributions to the angular power spectrum (APS) from extragalactic and galactic dark matter (DM) annihilation or decay. The Fermi-LAT collaboration reported detection of angular power with a significance larger than 3Ï in the energy range from 1Â GeV to 10Â GeV on 22 months of data (Ackermann et al., 2012 [2]). For these preliminary results the already published Fermi-LAT APS measurements (Ackermann et al., 2012 [2]) are compared to the accurate predictions for DM anisotropies from state-of-the-art cosmological simulations as presented in Fornasa et al. (2013) [1] to derive constraints on different DM candidates.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
G.A. Gómez-Vargas, A. Cuoco, T. Linden, M.A. Sánchez-Conde, J.M. Siegal-Gaskins, T. Delahaye, M. Fornasa, E. Komatsu, F. Prada, J. Zavala, on behalf of the Fermi-LAT Collaboration on behalf of the Fermi-LAT Collaboration,