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17 papers · 2 filters
Constraining the magnetic field in GRB relativistic collisionless shocks using radio data
Rodolfo Barniol Duran
Using GRB radio afterglow observations, we calculate the fraction of shocked plasma energy in the magnetic field in relativistic collisionless shocks (). We obtained for…
Magnetic Fields In Relativistic Collisionless Shocks
Rodolfo Santana, Rodolfo Barniol Duran, Pawan Kumar
We present a systematic study on magnetic fields in Gamma-Ray Burst (GRB) external forward shocks (FSs). There are 60 (35) GRBs in our X-ray (optical) sample, mostly from Swift. We…
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…
Binary Pulsar J0737-3039: Evidence for a new core collapse and neutron star formation mechanism
Simone Dall'Osso, Tsvi Piran, Nir Shaviv
The binary pulsar J0737-3039 is the only known system having two observable pulsars, thus offering a unique laboratory to test general relativity and explore pulsar physics. Based…
Light Curves from Supernova Shock Breakout through an Extended Wind
Sivan Ginzburg, Shmuel Balberg
Recent observations suggest that some supernovae may be the result of an explosion into an optically thick circumstellar material, the product of pre-explosion mass-loss (wind) by…
The Discovery of a New Instability in a Hyperaccretion Flow and its Implication for Gamma-ray Bursts
Norita Kawanaka, Shin Mineshige, Tsvi Piran
A hyperaccretion flow around a stellar mass black hole is thought to be the most plausible engine that powers gamma-ray bursts (GRBs). The flow efficiently cools via neutrino emiss…