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Contribution of Secondary Neutrinos from Line-of-sight Cosmic-Ray Interactions to the IceCube Diffuse Astrophysical Flux

Journal Article · · The Astrophysical Journal
 [1];  [2];  [2];  [3]
  1. Univ. of California, Los Angeles, CA (United States); University of California, Los Angeles
  2. Univ. of California, Los Angeles, CA (United States); Univ. of Tokyo, Chiba (Japan)
  3. Univ. of California, Los Angeles, CA (United States); Michigan State Univ., East Lansing, MI (United States)
+ Show Author Affiliations
In 10 years of observations, the IceCube neutrino observatory has revealed a neutrino sky in tension with previous expectations for neutrino point-source emissions. Astrophysical objects associated with hadronic processes might act as production sites for neutrinos, observed as point sources at Earth. Instead, a nearly isotropic flux of astrophysical neutrinos is observed up to PeV energies, prompting a reassessment of the assumed transport and production physics. This work applies a new physical explanation for neutrino production from populations of active galactic nuclei and starburst galaxies to three years of public IceCube point-source data. Specifically, cosmic rays produced at such sources might interact with extragalactic background light and gas along the line of sight, generating a secondary neutrino flux. Furthermore, this model is tested alongside a number of typical flux weighting schemes, in all cases the all-sky flux contribution being constrained to percent levels of the reported IceCube diffuse astrophysical flux.
Research Organization:
Univ. of California, Los Angeles, CA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC) High Energy Physics (HEP)
Grant/Contract Number:
SC0009937
OSTI ID:
1836504
Alternate ID(s):
OSTI ID: 1905684
OSTI ID: 23151744
Journal Information:
The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 2 Vol. 914; ISSN 0004-637X
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Active galactic nuclei
Blazars
Cosmic rays
Extragalactic magnetic fields
Gamma-rays
Intergalactic medium
Neutrino astronomy
Particle astrophysics
Starburst galaxies