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Anomalies in the gamma-ray diffuse emission of the Galaxy and implications for the interpretation of IceCube results

Several independent analyzes of Fermi-LAT results found evidences of an excess of $\gamma$-ray diffuse emission along the inner Galactic plane and of a related spatial dependence of the cosmic ray (CR) proton spectral index. These features are not accounted for by conventional models of CR transport...

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Detalles Bibliográficos
Autores principales: Grasso, D, Gaggero, D, Marinelli, A, Taoso, M, Urbano, A, Valli, M
Lenguaje:eng
Publicado: 2017
Materias:
Acceso en línea:https://dx.doi.org/10.1051/epjconf/201713603014
http://cds.cern.ch/record/2319805
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author Grasso, D
Gaggero, D
Marinelli, A
Taoso, M
Urbano, A
Valli, M
author_facet Grasso, D
Gaggero, D
Marinelli, A
Taoso, M
Urbano, A
Valli, M
author_sort Grasso, D
collection CERN
description Several independent analyzes of Fermi-LAT results found evidences of an excess of $\gamma$-ray diffuse emission along the inner Galactic plane and of a related spatial dependence of the cosmic ray (CR) proton spectral index. These features are not accounted for by conventional models of CR transport. We show that a phenomenological model accounting for those results in terms of spatial dependent CR transport also reproduces the $\gamma$-ray excess found by Milagro at 15 TeV in the inner Galactic plane and by H.E.S.S. in the Galactic center. We then use that model to compute the neutrino emission along the Galactic plane finding that is significantly larger than expected on the basis of conventional models. This emission is compatible with ANTARES upper limits and may soon be detected by IceCube or, more likely, by Km3NeT.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2017
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spelling oai-inspirehep.net-16739292021-05-03T08:12:38Zdoi:10.1051/epjconf/201713603014http://cds.cern.ch/record/2319805engGrasso, DGaggero, DMarinelli, ATaoso, MUrbano, AValli, MAnomalies in the gamma-ray diffuse emission of the Galaxy and implications for the interpretation of IceCube resultsAstrophysics and AstronomySeveral independent analyzes of Fermi-LAT results found evidences of an excess of $\gamma$-ray diffuse emission along the inner Galactic plane and of a related spatial dependence of the cosmic ray (CR) proton spectral index. These features are not accounted for by conventional models of CR transport. We show that a phenomenological model accounting for those results in terms of spatial dependent CR transport also reproduces the $\gamma$-ray excess found by Milagro at 15 TeV in the inner Galactic plane and by H.E.S.S. in the Galactic center. We then use that model to compute the neutrino emission along the Galactic plane finding that is significantly larger than expected on the basis of conventional models. This emission is compatible with ANTARES upper limits and may soon be detected by IceCube or, more likely, by Km3NeT.oai:inspirehep.net:16739292017
spellingShingle Astrophysics and Astronomy
Grasso, D
Gaggero, D
Marinelli, A
Taoso, M
Urbano, A
Valli, M
Anomalies in the gamma-ray diffuse emission of the Galaxy and implications for the interpretation of IceCube results
title Anomalies in the gamma-ray diffuse emission of the Galaxy and implications for the interpretation of IceCube results
title_full Anomalies in the gamma-ray diffuse emission of the Galaxy and implications for the interpretation of IceCube results
title_fullStr Anomalies in the gamma-ray diffuse emission of the Galaxy and implications for the interpretation of IceCube results
title_full_unstemmed Anomalies in the gamma-ray diffuse emission of the Galaxy and implications for the interpretation of IceCube results
title_short Anomalies in the gamma-ray diffuse emission of the Galaxy and implications for the interpretation of IceCube results
title_sort anomalies in the gamma-ray diffuse emission of the galaxy and implications for the interpretation of icecube results
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1051/epjconf/201713603014
http://cds.cern.ch/record/2319805
work_keys_str_mv AT grassod anomaliesinthegammaraydiffuseemissionofthegalaxyandimplicationsfortheinterpretationoficecuberesults
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AT taosom anomaliesinthegammaraydiffuseemissionofthegalaxyandimplicationsfortheinterpretationoficecuberesults
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