ELFT HÍRADÓ

[ilka AT szombat.konkoly.hu (Kalman Belane)]

                              Meghivó

      az MTA Konkoly Thege Miklós Csillagászati Kutatóintézete
                          szemináriumára



Elõadó: Felix Ryde
       (Stockholm Obs.)

Cím: "Emission Components in Gamma-Ray Bursts"
                                                                              
  
Abstract: 
The high-energy emission from gamma-ray bursts (GRBs)                 
is assumed to arise in a highly relativistic outflow                          
  
from a collapsing massive progenitor star. This outflow
is at first optically thick and as it becomes transparent
it will emit as a thermal black body. In the outflow, the
kinetic energy is dissipated in either shocks or magnetic
reconnections. Non-thermal electrons then emit the energy                     
  
in the gamma-rays through synchrotron and/or inverse Compton                  
  
emission. Both the non-thermal and the photospheric emission                  
  
components are expected to visible in the gamma-ray band, with                
  
varying strength. Another important aspect is the varying                     
  
light-travel times due to the curvature of the GRB shock                      
  
front. I will review some of the theoretical work and          
observational evidence that these results are based on.

A szeminárium idõpontja: 2004. május 27.  csütörtök, 14 óra

Helyszine: MTA Konkoly Thege Miklós Csillagászati Kutatóintézete
                  1121 Budapest Konkoly Thege M. ut 13-17.  


                                      Patkós László s.k.