80 citations · 1.2k across the 83 of their papers we have counts for
17 papers · 1 filter
Stripped-Envelope Supernovae for QCD Axion Detection
Francisco R. Candón, Damiano F. G. Fiorillo, Ángel Gil Muyor +3
QCD axions would be copiously produced in the proto-neutron star formed in a core-collapse supernova (SN). After escaping, they would convert into gamma rays in the Galactic magnet…
Diffuse neutrino flux from coronal magnetospheric current sheets of accreting black holes
Despina Karavola, Maria Petropoulou, Damiano F. G. Fiorillo +2
Non-jetted AGN exhibit hard X-ray emission with a power law spectrum above 2 keV, which is thought to be produced through Comptonization of soft photons by electrons and posi…
Small Progenitors, Large Couplings: Type Ic Supernova Constraints on Radiatively Decaying Particles
Francisco R. Candón, Damiano F. G. Fiorillo, Hans-Thomas Janka +2
Supernova (SN) 1987A provides classic bounds on gamma-ray flashes from the radiative decay of sub-GeV particles, but the latter may decay so rapidly as to be shielded by the stella…
Neutrinos from core-collapse supernovae
Georg G. Raffelt, Hans-Thomas Janka, Damiano F. G. Fiorillo
The core of a massive star (M > 8 Msun) eventually collapses. This implosion usually triggers a supernova (SN) explosion that ejects most of the stellar envelope and leaves behind…
Axion-photon conversion in transient compact stars: Systematics, constraints, and opportunities
Damiano F. G. Fiorillo, Ángel Gil Muyor, Hans-Thomas Janka +2
We study magnetic conversion of ultra-relativistic axion-like particles (ALPs) into photons in compact-star environments, focusing on the hot, transient conditions of core-collapse…
A generalized study of linear electromagnetic cascades in astrophysical sources
Damiano F. G. Fiorillo, Federico Testagrossa, Chengchao Yuan +2
High-energy gamma rays can trigger electromagnetic cascades via pair production on ambient photons, reprocessing their energy to lower frequencies. A classic example is the cascade…
Coupled Time-Dependent Proton Acceleration and Leptonic-Hadronic Radiation in Turbulent Supermassive Black Hole Coronae
Chengchao Yuan, Damiano F. G. Fiorillo, Maria Petropoulou +1
Turbulent coronae of supermassive black holes can accelerate non-thermal particles to high energies and produce observable radiation, but capturing this process is challenging due…
Lepton number crossings are insufficient for flavor instabilities
Damiano F. G. Fiorillo, Georg G. Raffelt
In dense neutrino environments, the mean field of flavor coherence can develop instabilities. A necessary condition is that the flavor lepton number changes sign as a function of e…
Neutrino-Mass-Driven Instabilities as the Earliest Flavor Conversion in Supernovae
Damiano F. G. Fiorillo, Hans-Thomas Janka, Georg G. Raffelt
Collective neutrino flavor conversions in core-collapse supernovae (SNe) begin with instabilities, initially triggered when the dominant outflow concurs with a small antineut…
Leading bounds on micro- to picometer fifth forces from neutron star cooling
Damiano F. G. Fiorillo, Alessandro Lella, Ciaran A. J. O'Hare +1
The equivalence principle and the inverse-square law of gravity could be violated at short distances ( to meters) by scalars sporting a coupling to nucleo…
Dispersion relation of the neutrino plasma: Unifying fast, slow, and collisional instabilities
Damiano F. G. Fiorillo, Georg G. Raffelt
In neutrino-dense astrophysical environments, these particles exchange flavor through a coherent weak field, forming a collisionless neutrino plasma with collective flavor dynamics…
The contribution of turbulent AGN coronae to the diffuse neutrino flux
Damiano F. G. Fiorillo, Luca Comisso, Enrico Peretti +2
Active galactic nuclei (AGN) can accelerate protons to energies of 10-100 TeV, with secondary production of high-energy neutrinos. If the acceleration is driven by magnetized…
Supernova production of axion-like particles coupling to electrons, reloaded
Damiano F. G. Fiorillo, Tetyana Pitik, Edoardo Vitagliano
We revisit the production of axion-like particles (ALPs) coupled to electrons at tree-level in a relativistic plasma. We explicitly demonstrate the equivalence between pseudoscalar…
Energy transfer by feebly interacting particles in supernovae: the trapping regime
Damiano F. G. Fiorillo, Tetyana Pitik, Edoardo Vitagliano
Feebly interacting particles, such as sterile neutrinos, dark photons, and axions, can be abundantly produced in the proto-neutron star (PNS) formed in core-collapse supernovae (CC…
Collective flavor conversions are interactions of neutrinos with quantized flavor waves
Damiano F. G. Fiorillo, Georg G. Raffelt
Collective oscillations in dense neutrino gases (flavor waves) are notable for their instabilities that cause fast flavor conversion. We develop a quantum theory of interacting neu…
Can the neutrinos from TXS 0506+056 have a coronal origin?
Damiano F. G. Fiorillo, Federico Testagrossa, Maria Petropoulou +1
The blazar TXS 0506+056 has been the first astrophysical source associated with high-energy astrophysical neutrinos, and it has emerged as the second-most-prominent hotspot in the…
Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities
Damiano F. G. Fiorillo, Georg G. Raffelt
Slow flavor evolution (defined as driven by neutrino masses and not necessarily ``slow'') is receiving fresh attention in the context of compact astrophysical environments. In Part…