Results 91 to 100 of about 3,996 (188)

Excitation of the nonresonant streaming instability around sources of ultrahigh-energy cosmic rays

Astronomy & Astrophysics
Aims. The interpretation of the ultrahigh-energy cosmic-ray (UHECR) spectrum and composition suggests a suppression of the flux below ≈1 EeV, as observed by the Pierre Auger Observatory and Telescope Array.
Cermenati Alessandro, Aloisio Roberto, Blasi Pasquale, Evoli Carmelo   +3 more
doaj   +1 more source

Atmospheric neutrinos and discovery of neutrino oscillations

Proceedings of the Japan Academy, Series B, 2010
Neutrino oscillation was discovered through studies of neutrinos produced by cosmic-ray interactions in the atmosphere. These neutrinos are called atmospheric neutrinos. They are produced as decay products in hadronic showers resulting from collisions of cosmic rays with nuclei in the atmosphere.
openaire   +3 more sources

Multimessenger flare in the quasar PKS 0446+11

Astronomy & Astrophysics
Context. The physical mechanisms driving neutrino and electromagnetic flares in blazars remain poorly understood. Aims. We investigate a prominent multimessenger flare in the quasar PKS 0446+11 to identify the processes responsible for its high-energy ...
Kovalev Y. Y., Aller M. F., Erkenov A. K., Gómez J. L., Homan D. C., Kivokurtseva P. I., Kovalev Yu. A., Lister M. L., de la Parra P. V., Plavin A. V., Popkov A. V., Pushkarev A. B., Readhead A. C. S., Shablovinskaia E., Sotnikova Yu. V., Spiridonova O. I., Troitsky S. V., Vlasyuk V. V.   +17 more
doaj   +1 more source

Hadronic Models of the Fermi Bubbles: Future Perspectives

Galaxies, 2018
The origin of sub-TeV gamma rays detected by Fermi-LAT from the Fermi bubbles at the Galactic center is still unknown. In a hadronic model, acceleration of protons and/or nuclei and their subsequent interactions with gas in the bubble volume can produce ...
Soebur Razzaque, Lili Yang
doaj   +1 more source

The physics case for neutrino–neutrino collisions

Journal of Physics G: Nuclear and Particle Physics
Abstract Addressing the mass origin and properties of neutrinos is of strong interest to particle physics, baryogenesis and cosmology. Popular explanations involve physics beyond the standard model, for example, the dimension-5 Weinberg operator or heavy Majorana neutrinos arising from ‘seesaw’ models.
Sitian Qian, Tianyi Yang, Sen Deng, Jie Xiao, Leyun Gao, Andrew Michael Levin, Qiang Li, Meng Lu, Zhengyun You   +8 more
openaire   +2 more sources

Searching for Hadronic Signatures in the Time Domain of Blazar Emission: The Case of Mrk 501

Universe
Blazars—a subclass of active galaxies—are intrinsically time-variable broadband sources of electromagnetic radiation. In this contribution, we explored relativistic proton (hadronic) signatures in the time domain blazar emission and searched for those ...
Margaritis Chatzis, Stamatios I. Stathopoulos, Maria Petropoulou, Georgios Vasilopoulos   +3 more
doaj   +1 more source

Fast Radio Bursts as Sources of Ultra-High-Energy Cosmic Rays: A Multi-Messenger Review

Universe
Fast radio bursts (FRBs) are millisecond-duration radio transients of extragalactic origin, while ultra-high-energy cosmic rays (UHECRs; E≳1018 eV) remain among the most important unresolved problems in astroparticle physics.
Luiz Augusto Stuani Pereira
doaj   +1 more source

Nonmonotonic rotation imprint on time-integrated neutrino spectral moments in a 15 M⊙ core-collapse supernova sequence

Astronomy & Astrophysics
We study the early postbounce neutrino signal of the published Garching 15 M⊙ rotating core-collapse supernova (CCSN) sequence consisting of nonrotating (NR), slowly rotating (SR, Ω0 = 0.5 rad s−1), and fast-rotating (FR, Ω0 = 150 rad s−1, artificially ...
Viaux N.
doaj   +1 more source

88th Annual Meeting of the Meteoritical Society 2026: Abstracts

Meteoritics &Planetary Science, Volume 61, Issue S1, Page S48-S551, August 2026.
wiley   +1 more source

Self-consistent modelling of neutrino production in turbulent black hole coronae

Astronomy & Astrophysics
Stochastic particle acceleration in magnetised turbulent plasmas has emerged as a key mechanism to explain multi-messenger signals from compact astrophysical environments.
Le Bihan S., Lemoine M., Rieger F.
doaj   +1 more source