Features of the Acoustic Mechanism of Core-Collapse Supernova Explosions

Details Features of the Acoustic Mechanism of Core-Collapse Supernova Explosions Features of the Acoustic Mechanism of Core-Collapse Supernova Explosions

2006-10-05

arxiv.org/abs/astro-ph/0610175v1

Astrophys.J.655:416-433,2007

Astronomy and Astrophysics

Astrophysics

Accepted to the Astrophysical Journal, 23 pages in emulateapj format, including 12 figures

Scientific paper

10.1086/509773

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]

Affiliated with

Also associated with

No associations

Rating

Features of the Acoustic Mechanism of Core-Collapse Supernova Explosions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Features of the Acoustic Mechanism of Core-Collapse Supernova Explosions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Features of the Acoustic Mechanism of Core-Collapse Supernova Explosions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-633454