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Relativistic Pair Beams from TeV Blazars: A Source of Reprocessed GeV Emission rather than IGM Heating
Lorenzo Sironi, Dimitrios Giannios
The interaction of TeV photons from blazars with the extragalactic background light produces a relativistic beam of electron-positron pairs streaming through the intergalactic medi…
Simulating the effect of the Sgr A* accretion flow on the appearance of G2 after pericenter
David Abarca, Aleksander Sadowski, Lorenzo Sironi
We study the dynamical interaction of the G2 cloud with the accretion flow around Sgr A* by means of three-dimensional, hydrodynamic simulations. We show the effects of the rotatin…
The signature of the central engine in the weakest relativistic explosions: GRB100316D
R. Margutti, A. M. Soderberg, M. H. Wieringa +9
We present late-time radio and X-ray observations of the nearby sub-energetic Gamma-Ray Burst (GRB)100316D associated with supernova (SN) 2010bh. Our broad-band analysis constrains…
Radio afterglows of a complete sample of bright Swift GRBs: predictions from present days to the SKA era
G. Ghirlanda, R. Salvaterra, D. Burlon +13
Radio observations of Gamma Ray Bursts afterglows are fundamental in providing insights into their physics and environment, and in constraining the true energetics of these sources…
A Late-Time Flattening of Light Curves in Gamma-Ray Burst Afterglows
Lorenzo Sironi, Dimitrios Giannios
The afterglow emission from Gamma-Ray Bursts (GRBs) is usually interpreted as synchrotron radiation from relativistic electrons accelerated at the GRB external shock, that decelera…
Location of the bow shock ahead of cloud G2 at the Galactic Center
A. Sadowski, R. Narayan, L. Sironi +1
We perform detailed magnetohydrodynamic simulations of the gas cloud G2 interacting with the accretion flow around the Galactic Center black hole Sgr A*. We take as our initial con…