Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21110518c&link_type=abstract
American Astronomical Society, AAS Meeting #211, #105.18; Bulletin of the American Astronomical Society, Vol. 39, p.931
Astronomy and Astrophysics
Astronomy
Scientific paper
The structure of supernovae and young supernova remnants, such as SN 1987A and Cas A, suggests hydrodynamic instabilities during the course of the explosion. Various instabilities have been studied in detail for the case of spherical, neutrino shock-revival models, but a variety of studies, including spectropolarimetry suggest that the intrinsic explosions are far from spherical. There have not been detailed flow instability studies of the jet-induced model, wherein bi-polar (and possibly uni-polar) jets drive the explosion. This scenario involves bow shocks resulting from the jets colliding along the equatorial plane of the supernova driving lateral, equatorial outflow. We present 2D numerical simulations of jet-induced supernovae with sufficiently fine resolution to resolve some of the growing modes of the Rayleigh-Taylor, Richtmeyer-Meshkov and Kelvin- Helmholtz instabilities. The unstable flow that develops may be related to the outward transport and distribution of radioactive nickel, to the formation of fast-moving knots as seen in Cas A and to the non-axisymmetric structure seen in spectropolarimetry.
Couch Sean M.
Milosavljevic Milos
Wheeler Justin C.
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