30 citations · 54 across the 13 of their papers we have counts for
15 papers
Guide field effects on particle acceleration in three-dimensional relativistic magnetic reconnection
Despina Karavola, Lorenzo Sironi, Maria Petropoulou
Relativistic magnetic reconnection is a key mechanism for particle acceleration in astrophysical plasmas. Recent 3D particle-in-cell simulations have shown that, for weak guide fie…
Neutrinos and gamma rays from Seyfert galaxies constrain the properties of coronal turbulence
Federico Testagrossa, Damiano F. G. Fiorillo, Luca Comisso +3
The TeV neutrino signal observed by IceCube from the active galactic nucleus (AGN) NGC 1068 can probe its innermost coronal regions. If these neutrinos originate from hadrons accel…
The role of Bethe-Heitler pair production in reconnection-driven flares in M87*
Maria Petropoulou, Despina Karavola, Lorenzo Sironi
Rapid TeV flares have been observed from the core of the active galaxy M87. These have been attributed to inverse Compton scattering of disk photons by electrons and positrons acce…
Magnetic reconnection with a 0.1 rate: Effective resistivity in general relativistic magnetohydrodynamics
B. Ripperda, M. P. Grehan, A. Moran +5
Relativistic magnetic reconnection is thought to power various multi-wavelength emission signatures from neutron stars and black holes. Relativistic resistive magnetohydrodynamics…
Diffuse neutrino flux from relativistic reconnection in AGN coronae
D. Karavola, M. Petropoulou, D. F. G. Fiorillo +3
IceCube observations point to Active Galactic Nuclei (AGN) as promising contributors to the observed astrophysical neutrino flux. Close to the central black hole, protons can be ac…
Superluminal Wave Activation at Relativistic Magnetized Shocks
Jens F. Mahlmann, Logan Eskildsen, Arno Vanthieghem +2
Fast radio bursts (FRBs) are extremely energetic radio transients, some are generated in magnetar magnetospheres and winds. Despite a growing number of observations, their emission…
Reconnection-Driven Turbulent Fluctuations in the Magnetically Dominated Collisionless Regime
Yue Hu, Luca Comisso, Lorenzo Sironi +1
Magnetic reconnection is a fundamental plasma process that converts magnetic energy into bulk flow energy, thermal energy, and nonthermal particle acceleration. Despite its importa…
Intermittency in Collisionless Large-Amplitude Turbulence
Ryan Golant, Luca Comisso, Philipp Kempski +1
Large-amplitude turbulence -- characterized by a fluctuating magnetic field component, , that is stronger than the mean component, -- is generically intermittent, populat…
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…
Filamentation of the electromagnetic precursor in relativistic quasi-perpendicular electron-positron shocks
Emanuele Sobacchi, Yuri Lyubarsky, Lorenzo Sironi +1
We present a scenario that could explain non-thermal particle acceleration in relativistic quasi-perpendicular electron-positron shocks, such as the termination shock of pulsar win…
On the universality of the split monopole black hole magnetosphere
S. Selvi, O. Porth, B. Ripperda +1
Black holes can acquire magnetic flux from their magnetized progenitor or via prolonged accretion. We study the evolution of black hole magnetospheres by means of axisymmetric gene…
Kinetic simulations of the Kruskal-Schwarzchild instability in accelerating striped outflows I: Dynamics and energy dissipation
William Groger, Hayk Hakobyan, Lorenzo Sironi
Astrophysical relativistic outflows are launched as Poynting-flux-dominated, yet the mechanism governing efficient magnetic dissipation, which powers the observed emission, is stil…
Escape of fast radio bursts from magnetars
Emanuele Sobacchi, Masanori Iwamoto, Lorenzo Sironi +1
Fast radio bursts (FRBs) are bright extragalactic transients likely produced by magnetars. We study the propagation of FRBs in magnetar winds, assuming that the wind is strongly ma…
Propagation of strong electromagnetic waves in tenuous plasmas
Emanuele Sobacchi, Masanori Iwamoto, Lorenzo Sironi +1
We study the propagation of electromagnetic waves in tenuous plasmas, where the wave frequency, , is much larger than the plasma frequency, . We show that in pair p…
Three-dimensional dynamics of strongly twisted magnetar magnetospheres: Kinking flux tubes and global eruptions
J. F. Mahlmann, A. A. Philippov, V. Mewes +3
The origins of the various outbursts of hard X-rays from magnetars (highly magnetized neutron stars) are still unknown. We identify instabilities in relativistic magnetospheres tha…