Work

Evidence for a Galactic gamma-ray halo

Year: 1998

Type: article

Abstract: We present quantitative statistical evidence for a $γ$-ray emission halo surrounding the Galaxy. Maps of the emission are derived. EGRET data were analyzed in a wavelet-based non-parametric hypothesis testing framework, using a model of expected diffuse (Galactic + isotropic) emission as a null hypothesis. The results show a statistically significant large scale halo surrounding the center of the Milky Way as seen from Earth. The halo flux at high latitudes is somewhat smaller than the isotropic gamma-ray flux at the same energy, though of the same order (O(10^(-7)--10^(-6)) ph/cm^2/s/sr above 1 GeV).

Source: New Astronomy

DOI: 10.1016/s1384-1076(98)00024-4

Authors: D.D. Dixon, D.H. Hartmann, E.D. Kolaczyk, J. Samimi, R. Diehl, G. Kanbach, H. Mayer-Hasselwander, A.W. Strong

Language: English

Topic: Astrophysics and Cosmic Phenomena

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,690

Funders: National Aeronautics and Space Administration, Max-Planck-Gesellschaft

OpenAlex ID: W2084615589

FWCI: 6.56

Cites: 20

Cited by: 86

Related to: 10