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High Energy Neutrino expectations from the Central Molecular Zone

The density of molecular gas in the central few hundreds parsecs of our Galaxy is estimated to be two orders of magnitude larger than the Galactic average. This, so called, Central Molecular Zone, represent a privileged target where to look for a signature of Galactic cosmic ray interactions. Here w...

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Detalles Bibliográficos
Autores principales: Marinelli, Antonio, Gaggero, Daniele, Grasso, Dario, Taoso, Marco, Urbano, Alfredo, Ventura, Sofia
Lenguaje:eng
Publicado: SISSA 2018
Materias:
Acceso en línea:https://dx.doi.org/10.22323/1.301.0939
http://cds.cern.ch/record/2672610
Descripción
Sumario:The density of molecular gas in the central few hundreds parsecs of our Galaxy is estimated to be two orders of magnitude larger than the Galactic average. This, so called, Central Molecular Zone, represent a privileged target where to look for a signature of Galactic cosmic ray interactions. Here we report the diffuse neutrino expectations from this region following a recently introduced phenomenological scenario. This model reproduces the Fermi-LAT and H.E.S.S. observations of the central 200 Parsecs without the need of local cosmic-ray accelerators. Once fixed the gas and source distribution parameters to reproduce the normalization of the gamma-ray observed, we use the same framework to obtain the neutrino emission from the molecular clouds Sagittarius B and Sagittarius A and for the whole inner 200 parsecs region. We compare our expectations with the point-like sensitivity of IceCube for this region of the sky and we consider also possible point-like contributions due to Supernovae Remnants contained inside this region. Finally we discuss the future perspectives of the Global Neutrino Network to characterize the neutrino emission from the Central Molecular Zone and the possibility to determine the Galactic cosmic-ray cutoff through the IceCube HESE events.