Gamma-ray and neutrino diffuse emissions of the Galaxy above the TeV

[摘要] Conventional cosmic ray propagation models face problems reproducing the diffuse γ-ray spectrum measured by Fermi-LAT over the entire sky. Those models also fail to smoothly connect Fermi-LAT results with data above the TeV as those taken by Milagro in the inner Galactic plane. In this contribution we show that a representative model adopting a spatial dependent rigidity scaling of the diffusion coefficient can reproduce all those experimental results without spoiling the consistency with local cosmic-ray measurements. We use the same model to compute the diffuse neutrino emission of the Galaxy and compare it with IceCube and ANTARES results.

[发布机构] GRAPPA Institute, University of Amsterdam, Science Park 904, Amsterdam; 1090 GL, Netherlands^1;INFN, Dipartimento di Fisica E. Fermi, Pisa University, Largo B. Pontecorvo 3, Pisa; 1-56127, Italy^2;CERN, Theory Division, Genéve 23; CH-1211, Switzerland^3;SISSA, INFN, via Bonomea 265, Trieste; 1-34136, Italy^4

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] ANTARES;Cosmic ray propagation;Diffuse emission;Galactic plane;Gamma ray spectra;Ice cubes;Neutrino emission