Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-11-06
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
22 pages, 6 figures, 2 Tables, accepted for publication in ApJ
Scientific paper
The rotation rate in pre-supernova cores is an important ingredient which can profoundly affect the post-collapse evolution and associated energy release in supernovae and long gamma ray bursts (LGRBs). Previous work has focused on whether the specific angular momentum is above or below the critical value required for the creation of a centrifugally supported disk around a black hole. Here, we explore the effect of the distribution of angular momentum with radius in the star, and show that qualitative transitions between high and low angular momentum flow, corresponding to high and low luminosity accretion states, can effectively be reflected in the energy output, leading to variability and the possibility of quiescent times in LGRBs.
Lee Hyun Woo
Lopez-Camara Diego
Ramirez-Ruiz Enrico
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