Seminar series

Long gamma-ray burst progenitors throughout cosmological time.

Matteo Cantiello, KITP

17 May 2012 - 16:00

Long Gamma-Ray Bursts (GRBs) are the most energetic explosions in the universe, allowing their light to travel billions of light years before reaching Earth. The observation that nearby long GRBs are often associated with SNe, show that they are produced by the death of a massive star. Interestingly both most popular scenarios for GRB production, the collapsar and the magnetar scenario, require very fast rotation of the progenitor stellar core. I will show single and binary stellar evolution calculations that fulfill the theoretical angular momentum requirement of long GRB scenarios. These models predict long GRBs to occur preferentially at low metallicity, with no long GRBs predicted above a metallicity threshold. I will also discuss theoretical predictions for the evolution of observational properties of long GRBs as a function of redshift.

LCO Seminar Series,
6740 Cortona Dr, Suite 102,
Goleta,
CA93117

seminarchair@lco.global