[Phys-seminars] 2017-04-24 Astrophysics and Cosmology Seminar

griv griv at bgu.ac.il
Thu Apr 20 15:19:42 IDT 2017


Astrophysics and Cosmology Seminar

 DATE: 24-04-17

 TIME: 15:00

 PLACE: Seminar Room 207, Building 54 (Physics)

TITLE: 
On the Nature of Radiative Processes in Gamma-Ray Bursts

SPEAKER: 
Dr. Lara Nava, INAF - National Institute for Astrophysics, Italy

ABSTRACT/COMMENTS: 
The nature of radiative processes responsible for prompt and afterglow radiation in Gamma-Ray Bursts is far from being understood. The lack of a clear understanding on how radiation is produced is strictly related to other fundamental open questions in GRB physics, such as the jet composition, the location of the emitting region, and the nature of mechanisms regulating energy dissipation and particle acceleration. In this talk, I present some recent developments in the field. In the context of afterglow emission, I discuss the origin of high-energy (GeV) radiation detected in around 100 GRBs by the Fermi-LAT and the prospects for GRB detection with the CTA. For prompt radiation, I present new findings on the characterisation of its spectral properties and I discuss how these new findings pose severe constraints on the properties of the emitting region.


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