Journal Article

PUBDB-2021-01548

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Unified thermal model for photohadronic neutrino production in astrophysical sources

Fiorillo (Corresponding author)INFN* ; Vliet, A. R. v. (Corresponding author)DESY* ; Morisi, S. (Corresponding author)INFN* ; Winter, W. (Corresponding author)DESY*

2021
IOP London

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Please use a persistent id in citations: doi:10.1088/1475-7516/2021/07/028  doi:10.3204/PUBDB-2021-01548

Report No.: DESY-21-045; arXiv:2103.16577

Abstract: High-energy astrophysical neutrino fluxes are, for many applications, modeled as simple power laws as a function of energy. While this is reasonable in the case of neutrino production in hadronuclear $pp$ sources, it typically does not capture the behavior in photohadronic $p\gamma$ sources: in that case, the neutrino spectrum depends on the properties of the target photons the cosmic rays collide with and on possible magnetic-field effects on the secondary pions and muons. We show that the neutrino production from known photohadronic sources can be reproduced by a thermal (black-body) target-photon spectrum if one suitably adjusts the temperature, thanks to multi-pion production processes. This allows discussing neutrino production from most known $p\gamma$ sources, such as gamma-ray bursts, active galactic nuclei and tidal disruption events, in terms of a few parameters. We apply this thermal model to study the sensitivity of different classes of neutrino telescopes to photohadronic sources: we classify the model parameter space according to which experiment is most suitable for detection of a specific source class and demonstrate that different experiment classes, such as dense arrays, conventional neutrino telescopes, or radio-detection experiments, cover different parts of the parameter space. Since the model can also reproduce the flavor and neutrino-antineutrino composition, we study the impact on the track-to-shower ratio and the Glashow resonance.

Keyword(s): neutrino: production ; neutrino: detector ; model: thermal ; neutrino: spectrum ; neutrino: flux ; photon: cosmic radiation ; photon hadron ; magnetic field: effect ; gamma ray: burst ; neutrino antineutrino ; temperature ; sensitivity ; black body ; capture ; flavor ; muon ; AGN

Note: JCAP 07 (2021) 028. 38 pages, 13 figures; data available at https://github.com/damianofiorillo/Unified-thermal-model

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Contributing Institute(s):

1. Theoretische Astroteilchenphysik (Z_THAT)

Research Program(s):

1. 613 - Matter and Radiation from the Universe (POF4-613) (POF4-613)
2. NEUCOS - Neutrinos and the origin of the cosmic rays (646623) (646623)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2021

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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