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FERMI BUBBLE γ-RAYS AS A RESULT OF DIFFUSIVE INJECTION OF GALACTIC COSMIC RAYS
2013
Astrophysical Journal Letters
Recently, the Fermi space telescope has discovered two large γ-ray emission regions, the so-called "Fermi bubbles", that extend up to ∼ 50^∘ above and below the Galactic center. The γ-ray emission from the bubbles are found to follow a hard spectrum with no significant spatial variation in intensity and spectral shape. The origin of the emission is still not clearly understood. Suggested explanations include injection of cosmic-ray nuclei from the Galactic center by high-speed Galactic winds,
doi:10.1088/2041-8205/778/1/l20
fatcat:j6c66v3hiraojmujnv4qi5dpyu