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Conservative Initial Mapping For Multidimensional Simulations of Stellar Explosions
Ke-Jung Chen, Alexander Heger, Ann Almgren
Mapping one-dimensional stellar profiles onto multidimensional grids as initial conditions for hydrodynamics calculations can lead to numerical artifacts, one of the most severe of…
Long Gamma-Ray Transients from Collapsars
S. E. Woosley, Alexander heger
In the collapsar model for common gamma-ray bursts, the formation of a centrifugally supported disk occurs during the first 10 seconds following the collapse of the iron core…
Multi-Zone Models of Superbursts from Accreting Neutron Stars
L. Keek, A. Heger
Superbursts are rare and energetic thermonuclear carbon flashes observed to occur on accreting neutron stars. We create the first multi-zone models of series of superbursts using a…
Multidimensional Simulations of Thermonuclear Supernovae from the First Stars
Ke-Jung Chen, Alexander Heger, Ann Almgren
Theoretical models suggest that the first stars in the universe could have been very massive, with typical masses 100 \Msun. Many of them might have died as energetic the…
Pair Instability Supernovae: Light Curves, Spectra, and Shock Breakout
Daniel Kasen, S. E. Woosley, Alexander Heger
For the initial mass range (140 < M < 260 Msun) stars die in a thermonuclear runaway triggered by the pair-production instability. The supernovae they make can be remarkably energe…