The galactic contribution to IceCube's astrophysical neutrino flux
Abstract
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 Edep>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.
- Authors:
-
- Univ. of Copenhagen (Denmark). The Niels Bohr Inst.
- Univ. of Hawaii at Manoa, Honolulu, HI (United States)
- Vanderbilt Univ., Nashville, TN (United States)
- Publication Date:
- Research Org.:
- Univ. of Hawaii, Honolulu, HI (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP); Danish National Research Foundation
- OSTI Identifier:
- 1598576
- Grant/Contract Number:
- SC0010504; SC0011981; DNRF91
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Cosmology and Astroparticle Physics
- Additional Journal Information:
- Journal Volume: 2017; Journal Issue: 08; Journal ID: ISSN 1475-7516
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; neutrino astronomy; neutrino experiments; galaxy morphology
Citation Formats
Denton, Peter B., Marfatia, Danny, and Weiler, Thomas J. The galactic contribution to IceCube's astrophysical neutrino flux. United States: N. p., 2017.
Web. doi:10.1088/1475-7516/2017/08/033.
Denton, Peter B., Marfatia, Danny, & Weiler, Thomas J. The galactic contribution to IceCube's astrophysical neutrino flux. United States. https://doi.org/10.1088/1475-7516/2017/08/033
Denton, Peter B., Marfatia, Danny, and Weiler, Thomas J. Tue .
"The galactic contribution to IceCube's astrophysical neutrino flux". United States. https://doi.org/10.1088/1475-7516/2017/08/033. https://www.osti.gov/servlets/purl/1598576.
@article{osti_1598576,
title = {The galactic contribution to IceCube's astrophysical neutrino flux},
author = {Denton, Peter B. and Marfatia, Danny and Weiler, Thomas J.},
abstractNote = {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 Edep>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.},
doi = {10.1088/1475-7516/2017/08/033},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 08,
volume = 2017,
place = {United States},
year = {Tue Aug 29 00:00:00 EDT 2017},
month = {Tue Aug 29 00:00:00 EDT 2017}
}
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