The galactic contribution to IceCube's astrophysical neutrino flux

Denton, Peter B.; Marfatia, Danny; Weiler, Thomas J.

doi:10.1088/1475-7516/2017/08/033

The galactic contribution to IceCube's astrophysical neutrino flux

Journal Article · Tue Aug 29 00:00:00 EDT 2017 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2017/08/033· OSTI ID:1598576

Denton, Peter B. ^[1]; Marfatia, Danny ^[2]; Weiler, Thomas J. ^[3]

Univ. of Copenhagen (Denmark). The Niels Bohr Inst.; UH High Energy Physics Group
Univ. of Hawaii at Manoa, Honolulu, HI (United States)
Vanderbilt Univ., Nashville, TN (United States)

High energy neutrinos have been detected by IceCube, but their origin remains a mystery. Determining the sources of this flux is a crucial first step towards multi-messenger studies. Here, we systematically compare two classes of sources with the data: Galactic and extragalactic. We assume that the neutrino sources are distributed according to a class of Galactic models. We build a likelihood function on an event by event basis including energy, event topology, absorption, and direction information. We present the probability that each high energy event with deposited energy E_dep>60 TeV in the HESE sample is Galactic, extragalactic, or background. Lastly, for Galactic models considered the Galactic fraction of the astrophysical flux has a best fit value of 1.3% and is <9.5% at 90\% CL. A zero Galactic flux is allowed at <1σ.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Hawaii, Honolulu, HI (United States)

Sponsoring Organization:: Danish National Research Foundation; USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: SC0010504; SC0011981

OSTI ID:: 1598576

Alternate ID(s):: OSTI ID: 1535569
OSTI ID: 22676046

Journal Information:: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 08 Vol. 2017; ISSN 1475-7516

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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