![]() ![]() While relativistic outflows in TDEs have become recently interesting per se and models for the neutrino emission from jetted TDEs exist, a direct connection between TDE jets pointing in our direction and astrophysical neutrinos has not been identified yet. For internal shock models, the UHECR paradigm for GRBs can only be maintained in the light of neutrino stacking limits in multi-zone models. We furthermore speculate that neutrino flares in AGN blazars may be related to super-Eddington accretion flares, or that GRBs are powered by significantly higher kinetic energies than typically assumed in electromagnetic models. Neutrinos are tiny particles that could hold secrets to some of the universes biggest mysteries. We demonstrate that both AGN blazars (in the context of neutrino observations) and GRBs (as UHECR sources in the context of neutrino-non-observations) point towards acceleration spectra harder than $E^$, or relatively high minimal cosmic-ray injection energies, to meet the respective energy budget requirements. We especially focus on challenges at the interface to particle acceleration which can be inferred from the multi-messenger context, such as the paradigm that the sources power the Ultra-High-Energy Cosmic Rays (UHECRs). ![]() Occasionnellement, cette désignation peut semployer dans un sens plus. Ce terme se rapporte habituellement au neutrino dextrogyre, particule quil faudrait alors ajouter au modèle standard. Celui-ci est la théorie qui décrit les particules et leurs interactions fondamentales. Des études s’étendant sur des dizaines d’années. Quest-ce que le neutrino Le neutrino est une particule élémentaire décrit dans le modèle standard de la physique des particules. Il décrit les diverses sources de neutrinos : Soleil, Terre, accélérateurs, réacteurs nucléaires, supernovae. Pauli en 1930 jusqu’aux expériences les plus récentes de physique des particules. Par Sciences et Avenir le à 20h15, mis à jour le à 20h15 Lecture 3 min. Objectif : mieux connaître les neutrinos, des particules très furtives que les physiciens traquent depuis des décennies. ![]() Download a PDF of the paper titled Sources of high-energy astrophysical neutrinos, by Walter Winter Download PDF HTML (experimental) Abstract:We discuss recent results in neutrino astronomy and their implications for the cosmic-ray acceleration in relativistic outflows, such as in Active Galactic Nuclei (AGN) jets, Gamma-Ray Bursts (GRBs), and Tidal Disruption Events (TDEs). Le terme neutrino stérile est utilisé pour le distinguer du neutrino actif du modèle standard, qui dispose dune charge pour l interaction faible. Physicists want to ramp up their efforts to weigh neutrinos, which are perhaps the most mysterious of all elementary particles. Ce livre relate l’histoire des neutrinos, depuis leur prédiction théorique par W. Neutrinos plus rapides que la lumière : un nouveau test en cours. ![]()
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