Jets in Gamma-ray Bursts: Structure, Breakout and Dissipation

Rodolfo Barniol Duran (Sacramento State) - February 5, 2017 at 12:10 pm

The recent discovery of a short gamma-ray burst (GRB) associated with a gravitational-wave event from a binary neutron star merger has sparked renewed interest in these fascinating phenomena. Motivated by our recent 3D MHD jet simulations, in the first part of the talk I will describe our efforts to study the jet structure of short GRBs. I will also discuss how the associated electromagnetic emission of a (misaligned) short GRB is able to explain many of the recent Fermi-LIGO observations. In the second part of the talk, I will focus on long GRB jets. I will describe how a simple model (the “collapsar” model) can explain some basic observed properties of long GRBs with some interesting implications about the supernova-central engine connection. I will conclude by describing our efforts to understand the gamma-ray production mechanism in GRBs. These different endeavors are part of a larger enterprise to model the development of the jet from its birthplace (the black hole) to the much larger scales (the radiation phase).

The seminar will be held in 131A Campbell Hall.

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