Jul 5 – 10, 2021
Europe/Rome timezone

Session

Photospheric Emission in GRBs

GB3
Jul 5, 2021, 4:30 PM

Conveners

Photospheric Emission in GRBs: Block 1

  • Damien Begue (Bar Ilan University)
  • Gregory Vereshchagin (ICRANet)

Photospheric Emission in GRBs: Block 2

  • Gregory Vereshchagin (ICRANet)
  • Damien Begue (Bar Ilan University)

Description

Time resolved spectra of many gamma-ray bursts present signatures of evolving thermal component in keV band, either in the prompt emission or in the early afterglow. In some bursts this component is dominant with respect to the non-thermal one, in others it is less pronounced. Such thermal component is associated with the photosphere of highly relativistic outflows launched by the central engine. In our session we will discuss basic radiation mechanisms producing observed spectra and light curves of gamma-ray bursts and their respective roles. Special attention will be given to theoretical and observational results aiming at discrimination between these mechanisms, in particular synchrotron and photospheric emission.

Presentation materials

Damien Begue (Bar Ilan University), Gregory Vereshchagin (ICRANet)
Photospheric Emission in GRBs
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