CfA Colloquium Schedule Fall 2009
 
 3 September 2009

3 September 2009

Speaker: Andrew MacFadyen (NYU)

Title:Extreme Stellar Explosions - The Dynamics and Observational Signatures of Gamma-Ray Bursts

Abstract:It is now clear that a subset of massive stars are capable of exploding relativistically. These explosions are observed as gamma-ray bursts (GRBs) with accompanying supernovae. Stellar evolution thus follows an unexpected channel which I will argue is related to black hole or, possibly, magnetar formation. I will discuss progress in understanding the dynamics and observational signatures of these explosions. I will present new multi-dimensional simulations and computed light curves of GRB blastwaves in the afterglow phase. I will also present recent work demonstrating the generation and amplification of magnetic fields in astrophysical outflows relevant for models of GRB prompt and afterglow emission.

Video of the Presentation (Talks can be viewed with RealPlayer. Free download is available from www.real.com )

 
 

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