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- W3100844239 endingPage "123" @default.
- W3100844239 startingPage "123" @default.
- W3100844239 abstract "We present four ab initio axisymmetric core-collapse supernova simulations for 12, 15, 20, and 25 $M_odot$ progenitors. All of the simulations yield explosions and have been evolved for at least 1.2 seconds after core bounce and 1 second after material first becomes unbound. Simulations were computed with our Chimera code employing spectral neutrino transport, special and general relativistic transport effects, and state-of-the-art neutrino interactions. Continuing the evolution beyond 1 second allows explosions to develop more fully and the processes powering the explosions to become more clearly evident. We compute explosion energy estimates, including the binding energy of the stellar envelope outside the shock, of 0.34, 0.88, 0.38, and 0.70 B ($10^{51}$ ergs) and increasing at 0.03, 0.15, 0.19, and 0.52 B s$^{-1}$, respectively, for the 12, 15, 20, and 25 $M_odot$ models. Three models developed pronounced prolate shock morphologies, while the 20 $M_odot$ model, though exhibiting lobes and accretion streams like the other models, develops an approximately spherical, off-center shock as the explosion begins and then becomes moderately prolate $sim$600 ms after bounce. This reduces the explosion energy relative to the other models by reducing mass accretion during the critical explosion power-up phase. We examine the growth of the explosion energy in our models through detailed analyses of the energy sources and flows. We find that the 12 and 20 $M_odot$ models have explosion energies comparable to that of the lower range of observed explosion energies while the 15 and 25 $M_odot$ models are within the range of observed explosion energies, particularly considering the rate at which their explosion energies are increasing. The ejected $^{56}$Ni masses given by our models are all within observational limits as are the proto-neutron star masses and kick velocities. (Truncated)" @default.
- W3100844239 created "2020-11-23" @default.
- W3100844239 creator A5004575978 @default.
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- W3100844239 date "2016-02-16" @default.
- W3100844239 modified "2023-09-24" @default.
- W3100844239 title "THE DEVELOPMENT OF EXPLOSIONS IN AXISYMMETRIC<i>AB INITIO</i>CORE-COLLAPSE SUPERNOVA SIMULATIONS OF 12–25 ${M}_{odot }$ STARS" @default.
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