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Spectral and timing properties of a dissipative GRB photosphere
Dimitrios Giannios, Henk C. Spruit
We explore the observational appearance of the photosphere of an ultrarelativistic flow with internal dissipation of energy as predicted by the magnetic reconnection model. Previou…
Flares in GRB afterglows from delayed magnetic dissipation
Dimitrios Giannios
One of the most intriguing discoveries made by the Swift satellite is the flaring activity in about half of the afterglow lightcurves. Flares have been observed on both long and sh…
Prompt emission spectra from the photosphere of a GRB
Dimitrios Giannios
I explore the observational appearance of the photosphere of an ultrarelativistic flow with internal dissipation of energy (``dissipative'' GRB models). As a case study, I use the…
The role of kink instability in Poynting-flux dominated jets
Dimitrios Giannios, Henk C. Spruit
The role of kink instability in magnetically driven jets is explored through numerical one-dimensional steady relativistic MHD calculations. The instability is shown to have enough…