Studying Gamma Ray Bursts from a new perspective
Dr. Giancarlo Ghirlanda (INAF - Astronomski observatorij v Breri, Italija) bo predaval o izbruhih sevanja gama v ponedeljek, 3. junija 2013 ob 13. uri v predavalnici F4, Jadranska 19, FMF, Ljubljana. Predavanje bo v angleščini. Vljudno vabljeni!
Prejšnja predavanja so na razpolago na spletni strani Astrodebate.
Povzetek predavanja:
I will summarize the current observational status of the prompt emission of Gamma Ray Bursts and discuss some related issues: thermal vs non-thermal components, the nature of the high energy [GeV] component and the "color"-luminosity correlations.
A step forward in understanding the physics of Gamma Ray Bursts is to consider their comoving frame properties. I will show that accounting for the relativistic beaming, GRBs appear to have a nearly "universal" comoving-frame energy/luminosity. This offers a unifying interpretation of the "color"-luminosity relations if there is a link between the geometry and the dynamics in GRB outflows.
Through the results of a population synthesis code the expected dynamical and geometrical properties of GRBs as a population are derived and predictions for the detection rate of GRBs at long wavelengths by forthcoming radio facilities will be presented.