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Blazar flares powered by plasmoids in relativistic reconnection
Maria Petropoulou, Dimitrios Giannios, Lorenzo Sironi
Powerful flares from blazars with short ( min) variability timescales are challenging for current models of blazar emission. Here, we present a physically motivated ab initio…
Plasmoids in relativistic reconnection, from birth to adulthood: first they grow, then they go
L. Sironi, D. Giannios, M. Petropoulou
Blobs, or quasi-spherical emission regions containing relativistic particles and magnetic fields, are often assumed ad hoc in emission models of relativistic astrophysical jets, ye…
The microphysics of collisionless shock waves
A. Marcowith, A. Bret, A. Bykov +12
Collisionless shocks, that is shocks mediated by electromagnetic processes, are customary in space physics and in astrophysics. They are to be found in a great variety of objects a…
Particle acceleration in explosive relativistic reconnection events and Crab Nebula gamma-ray flares
Maxim Lyutikov, Lorenzo Sironi, Sergey Komissarov +1
We develop a model of particle acceleration in explosive reconnection events in relativistic magnetically-dominated plasmas and apply it to explain gamma-ray flares from the Crab N…
Radio synchrotron emission from secondary electrons in interaction-powered supernovae
Maria Petropoulou, Atish Kamble, Lorenzo Sironi
Several supernovae (SNe) with an unusually dense circumstellar medium (CSM) have been recently observed at radio frequencies. Their radio emission is powered by relativistic electr…