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Neutrino Fluxes from Active Galaxies: a Model-Independent Analysis
Astrophysics · Submitted 21 Feb 1997
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We show that their flux can be estimated by model-independent methods, based on dimensional analysis and textbook particle physics.
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The abstract, sentence by sentence
There are tantalizing hints that jets, powered by supermassive black holes at the center of active galaxies, are true cosmic proton accelerators. They produce photons of TeV energy, possible higher, and may be the enigmatic source of the highest energy cosmic rays. Photoproduction of neutral pions by accelerated protons on UV light is the source of the highest energy photons, in which most of the bolometric luminosity of the galaxy may be emitted. The case that proton beams power active galaxies is, however, far from conclusive. Neutrinos from the decay of charged pions represent an uncontrovertible signature for the proton induced cascades. We show that their flux can be estimated by model-independent methods, based on dimensional analysis and textbook particle physics. Our calculations also demonstrate why different models for the proton blazar yield very similar results for the neutrino flux, consistent with the ones obtained here.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | There are tantalizing hints that jets, powered by supermassive black holes at the center of active galaxies, are true cosmic proton accelerators. | background 1.00 | 0.08 | 0.04 | hedged possibility 0.98 |
| s1 | They produce photons of TeV energy, possible higher, and may be the enigmatic source of the highest energy cosmic rays. | background 1.00 | 0.06 | 0.03 | hedged possibility 0.94 |
| s2 | Photoproduction of neutral pions by accelerated protons on UV light is the source of the highest energy photons, in which most of the bolometric luminosity of the galaxy may be emitted. | background 0.97 | 0.08 | 0.05 | asserted 0.82 |
| s3 | The case that proton beams power active galaxies is, however, far from conclusive. | gap 0.67 | 0.05 | 0.04 | asserted 0.83 |
| s4 | Neutrinos from the decay of charged pions represent an uncontrovertible signature for the proton induced cascades. | background 0.93 | 0.07 | 0.09 | asserted 1.00 |
| s5 | We show that their flux can be estimated by model-independent methods, based on dimensional analysis and textbook particle physics. | method 0.77 | 0.95 | 0.49 | asserted 1.00 |
| s6 | Our calculations also demonstrate why different models for the proton blazar yield very similar results for the neutrino flux, consistent with the ones obtained here. | result 0.64 | 0.94 | 0.27 | asserted 0.99 |
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The paper
Original abstract
There are tantalizing hints that jets, powered by supermassive black holes at the center of active galaxies, are true cosmic proton accelerators. They produce photons of TeV energy, possible higher, and may be the enigmatic source of the highest energy cosmic rays. Photoproduction of neutral pions by accelerated protons on UV light is the source of the highest energy photons, in which most of the bolometric luminosity of the galaxy may be emitted. The case that proton beams power active galaxies is, however, far from conclusive. Neutrinos from the decay of charged pions represent an uncontrovertible signature for the proton induced cascades. We show that their flux can be estimated by model-independent methods, based on dimensional analysis and textbook particle physics. Our calculations also demonstrate why different models for the proton blazar yield very similar results for the neutrino flux, consistent with the ones obtained here.
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References
How the literature uses it
12 arXiv papers cite this in 15 sentences
Papers citing it · 7 sentences without a confident label
Cites it as background 8 papers
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Many astrophysical sources have been proposed as possible sources of the high-energy neutrinos, including gamma-ray bursts [ref] , star-forming galaxies and starburst galaxies [ref] , blazars and non-Blazar active galactic nuclei (AGNs) [ref] , tidal disruption events [ref] , etc.
Investigating the correlations between IceCube high-energy neutrinos and Fermi-LAT gamma-ray observations · Introduction · 0.94
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Photohardonic processes are typically expected in jets or/and cores of active galactic nuclei (AGN) [ref] and jets of Gamma-ray burst [ref] while for starburst galaxies (SBGs) [ref] , hadronuclear reactions are anticipated to be the main contribution.
Probing neutrino production in high-energy astrophysical neutrino sources with the Glashow Resonance · High-energy Neutrino Sources · 0.90
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Many varieties of astrophysical objects have been proposed as potential sources of high-energy neutrinos, including gamma-ray bursts [ref] , star-forming and starburst galaxies [ref] , both blazar and non-blazar active galactic nuclei (AGN) [ref] , as well as tidal disruption events [ref] , and fast radio bursts [ref] .
Revisiting AGN as the Source of IceCube's Diffuse Neutrino Flux · Introduction · 1.00
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