New paper "The anatomy of a long gamma-ray burst"
The anatomy of a long gamma-ray burst: a simple classification scheme for the emission mechanisms
The emission processes behind the most energetic events in the Universe, gamma-ray bursts, are as of yet unknown. Most processes that have been considered have been treated independently. KTH scientists Damien Bégué and J. Michael Burgess have recently published a paper combining all three processes into a single mechanism for the first time. They show that the emission from internal and external shocks as well as from the photosphere occur within the relativistic outflow created when massive stars die simultaneously but each mechanism has a brightness determined by a single parameter. This parameter is ratio of radiative energy to mass energy in the jet. This allows for several new testable predictions to be made about the observed data.