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  Features of the Acoustic Mechanism of Core-Collapse Supernova Explosions

Burrows, A., Livne, E., Dessart, E., Ott, C. D., & Murphy, J. (2007). Features of the Acoustic Mechanism of Core-Collapse Supernova Explosions. Astrophysical Journal, 665(1), 416-433. doi:10.1086/509773.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4885-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-4886-0
Genre: Journal Article

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 Creators:
Burrows, Adam, Author
Livne, Eli, Author
Dessart, E., Author
Ott, Christian D.1, Author
Murphy, Jeremiah, Author
Affiliations:
1Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013              

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 Abstract: In the context of 2D, axisymmetric, multi-group, radiation/hydrodynamic simulations of core-collapse supernovae over the full 180$^{\circ}$ domain, we present an exploration of the progenitor dependence of the acoustic mechanism of explosion. All progenitor models we have tested with our Newtonian code explode. We investigate the roles of the Standing-Accretion-Shock-Instability (SASI), the excitation of core g-modes, the generation of core acoustic power, the ejection of matter with r-process potential, the wind-like character of the explosion, and the fundamental anisotropy of the blasts. We find that the breaking of spherical symmetry is central to the supernova phenomenon and the blasts, when top-bottom asymmetric, are self-collimating. We see indications that the initial explosion energies are larger for the more massive progenitors, and smaller for the less massive progenitors, and that the neutrino contribution to the explosion energy may be an increasing function of progenitor mass. The degree of explosion asymmetry we obtain is completely consistent with that inferred from the polarization measurements of Type Ic supernovae. Furthermore, we calculate for the first time the magnitude and sign of the net impulse on the core due to anisotropic neutrino emission and suggest that hydrodynamic and neutrino recoils in the context of our asymmetric explosions afford a natural mechanism for observed pulsar proper motions. [abridged]

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 Dates: 2007-01-20
 Publication Status: Published in print
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 Identifiers: eDoc: 293696
Other: arXiv:astro-ph/0610175
URI: http://www.journals.uchicago.edu/doi/abs/10.1086/509773
DOI: 10.1086/509773
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Title: Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 665 (1) Sequence Number: - Start / End Page: 416 - 433 Identifier: ISSN: 1538-4357