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Electromagnetic Signatures of Relativistic Explosions in AGN Disks
Rosalba Perna, Davide Lazzati, Matteo Cantiello
The disks of Active Galactic Nuclei (AGNs), traditionally studied as the feeders of the supermassive black holes (SMBHs) at their centers, have recently triggered a lot of interest…
Short duration gamma-ray bursts and their outflows in light of GW170817
Davide Lazzati
The detection of GW170817, it's extensive multi-wavelength follow-up campaign, and the large amount of theoretical development and interpretation that followed, have resulted in a…
Photospheric Polarization Signatures From Long Gamma Ray Burst Simulations
Tyler Parsotan, Diego Lopez-Camara, Davide Lazzati
A comprehensive understanding of Gamma Ray Bursts (GRBs) has been elusive due to the variety of questions surrounding the radiation mechanism at play in these events. Polarization…
Intrinsic properties of the engine and jet that powered the short gamma-ray burst associated with GW170817
Davide Lazzati, Riccardo Ciolfi, Rosalba Perna
GRB 170817A was a subluminous short gamma-ray burst detected about 1.74 s after the gravitational wave signal GW170817 from a binary neutron star (BNS) merger. It is now understood…
Polarization constraints on the geometry of the magnetic field in the external shock of gamma-ray bursts
Eric Stringer, Davide Lazzati
We study the ensemble of linear polarization measurement in the optical afterglows of long-duration gamma-ray bursts. We assume a non sideways-expanding top-hat jet geometry and us…