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Article
Report number arXiv:2308.08233 ; PoS-ICRC2023-1046
Title Galactic and Extragalactic Analysis of the Astrophysical Muon Neutrino Flux with 12.3 years of IceCube Track Data
Author(s) IceCube Collaboration  Zeige alle 405 Autoren
Publication 2023-07-25
Imprint 2023-08-16
Number of pages 11
Note Presented at the 38th International Cosmic Ray Conference (ICRC2023). See arXiv:2307.13047 for all IceCube contributions
In: PoS ICRC2023 (2023) pp.1046
In: 38th International Cosmic Ray Conference (ICRC 2023), Nagoya, Japan, 26 Jul - 3 Aug 2023, pp.1046
DOI 10.22323/1.444.1046
10.22323/1.444.1046 (publication)
Subject category astro-ph.HE ; Astrophysics and Astronomy
Accelerator/Facility, Experiment ICECUBE
Abstract The Ice Cube Neutrino Observatory has been measuring an isotropic astrophysical neutrino flux in multiple detection channels for almost a decade. Galactic diffuse emission, which arises from the interactions between cosmic rays and the interstellar medium, is an expected signal in IceCube. The superposition of an extragalactic flux and a galactic flux results in directional structure and variations in the spectrum. In this work, we use 12.3 years of high-purity muon-neutrino induced muon track data to perform a dedicated search for this galactic emission, combined with a spectral measurement of the isotropic astrophysical neutrino flux. To distinguish a galactic component from the dominant atmospheric and isotropic astrophysical components, the precise directional information available for muon tracks is fully utilized in a three-dimensional forward folding likelihood fit. We test a state-of-the-art model prediction of galactic diffuse emission based on recent cosmic ray data (CRINGE). We fit this prediction as a template scaled by a factor ΨCRINGEΨCRINGE, and find 2.9±1.1×ΨCRINGE2.9±1.1×ΨCRINGE with a significance of 2.7σ2.7σ in an energy range between 400 GeV and 60 TeV in the Northern Sky.
Copyright/License preprint: (License: arXiv nonexclusive-distrib 1.0)
CC-BY-NC-ND-4.0



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