GALACTIC DIFFUSE GAMMA RAYS-RECALCULATION BASED ON NEW MEASUREMENTS OF THE COSMIC ELECTRON SPECTRUM

摘要: In this work, we revisit the all-sky Galactic diffuse gamma-ray emission taking into account new measurements of cosmic ray (CR) electron/positron spectrum by PAMELA, ATIC, and Fermi, which show excesses electrons/positrons beyond expected fluxes in conventional model. Since origins extra are not clear, consider three different scenarios to for excesses: astrophysical sources such as pulsars, dark matter (DM) decay, DM annihilation. Further, results from Fermi-LAT on (extra-)Galactic gamma-rays adopted. The background CRs without give lower compared observation, is consistent with previous analysis. scenario predicts little difference background. annihilation models tau(+/-) final state disfavored Fermi data, while there only a few constraints decaying scenario. Furthermore, always bump at higher energies (similar TeV) spectra due radiation. Finally, find that data can be explained simply enlarging normalization electron introducing any sources, may indicate current much stronger given precise estimate.