The Spectrum and Morphology of the $Fermi$ Bubbles
- Ackermann, M.
- Albert, A.
- Atwood, W.B.
- Baldini, L.
- Ballet, J.
- Barbiellini, G.
- Bastieri, D.
- Bellazzini, R.
- Bissaldi, E.
- Blandford, R.D.
- Bloom, E.D.
- Bottacini, E.
- Brandt, T.J.
- Bregeon, J.
- Bruel, P.
- Buehler, R.
- Buson, S.
- Caliandro, G.A.
- Cameron, R.A.
- Caragiulo, M.
- Caraveo, P.A.
- Cavazzuti, E.
- Cecchi, C.
- Charles, E.
- Chekhtman, A.
- Chiang, J.
- Chiaro, G.
- Ciprini, S.
- Claus, R.
- Cohen-Tanugi, Johann
- Conrad, J.
- Cutini, S.
- d'Ammando, F.
- de Angelis, A.
- de Palma, F.
- Dermer, C.D.
- Digel, S.W.
- Di Venere, L.
- Do Couto E Silva, E.
- Drell, P.S.
- Favuzzi, C.
- Ferrara, E.C.
- Focke, W.B.
- Franckowiak, A.
- Fukazawa, Y.
- Funk, S.
- Fusco, P.
- Gargano, F.
- Gasparrini, D.
- Germani, S.
- Giglietto, N.
- Giordano, F.
- Giroletti, M.
- Godfrey, G.
- Gomez-Vargas, G.A.
- Grenier, I.A.
- Guiriec, S.
- Hadasch, D.
- Harding, A.K.
- Hays, E.
- Hewitt, J.W.
- Hou, X.
- Jogler, T.
- Jóhannesson, G.
- Johnson, A.S.
- Johnson, W.N.
- Kamae, T.
- Kataoka, J.
- Knödlseder, J.
- Kocevski, D.
- Kuss, M.
- Larsson, S.
- Latronico, L.
- Longo, F.
- Loparco, F.
- Lovellette, M.N.
- Lubrano, P.
- Malyshev, D.
- Manfreda, A.
- Massaro, F.
- Mayer, M.
- Mazziotta, M.N.
- Mcenery, J.E.
- Michelson, P.F.
- Mitthumsiri, W.
- Mizuno, T.
- Monzani, M.E.
- Morselli, A.
- Moskalenko, I.V.
- Murgia, S.
- Nemmen, R.
- Nuss, E.
- Ohsugi, T.
- Omodei, N.
- Orienti, M.
- Orlando, E.
- Ormes, J.F.
- Paneque, D.
- Panetta, J.H.
- Perkins, J.S.
- Pesce-Rollins, M.
- Petrosian, V.
- Piron, F.
- Pivato, G.
- Rainò, S.
- Rando, R.
- Razzano, M.
- Razzaque, S.
- Reimer, A.
- Reimer, O.
- Sánchez-Conde, M.
- Schaal, M.
- Schulz, A.
- Sgrò, C.
- Siskind, E.J.
- Spandre, G.
- Spinelli, P.
- Stawarz, Ł
- Strong, A.W.
- Suson, D.J.
- Tahara, M.
- Takahashi, H.
- Thayer, J.B.
- Tibaldo, L.
- Tinivella, M.
- Torres, D.F.
- Tosti, G.
- Troja, E.
- Uchiyama, Y.
- Vianello, G.
- Werner, M.
- Winer, B.L.
- Wood, K.S.
- Wood, M.
- Zaharijas, G.
DOIAbstract
International audienceThe Fermi bubbles are two large structures in the gamma-ray sky extending to 55° above and below the Galactic center. We analyze 50 months of Fermi Large Area Telescope data between 100 MeV and 500 GeV above 10° in Galactic latitude to derive the spectrum and morphology of the Fermi bubbles. We thoroughly explore the systematic uncertainties that arise when modeling the Galactic diffuse emission through two separate approaches. The gamma-ray spectrum is well described by either a log parabola or a power law with an exponential cutoff. We exclude a simple power law with more than 7σ significance. The power law with an exponential cutoff has an index of 1.9 ± 0.2 and a cutoff energy of 110 ± 50 GeV. We find that the gamm...
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