Hydrodynamic Experiments that Simulate Jets in Supernova Explosions

Details Hydrodynamic Experiments that Simulate Jets in Supernova Explosions Hydrodynamic Experiments that Simulate Jets in Supernova Explosions

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..apr.j1031k&link_type=abstract

American Physical Society, April Meeting, 2003, April 5-8, 2003 Philadelphia, Pennsylvania, MEETING ID: APR03, abstract #J1.031

Astronomy and Astrophysics

Astrophysics

Scientific paper

Recent observations of core collapse supernovae provide increasing evidence that supernova explosions are intrinsically asymmetric. An explosion model based on the assumption that bipolar, non-relativistic jets form during core collapse predicts an efficient ejection of a highly asymmetric supernova envelope and helps in understanding many of the observations (Khokhlov, et. al. ApJ 524, L107, 1999). Since the complex numerical hydrodynamic simulations of these jets require validation, we have designed a series of hydrodynamically-scaled jet experiments on the Omega laser at the University of Rochester. The jet in these experiments is formed by the laser ablation of the end of a cylinder of aluminum or magnesium that is imbedded in a gold washer. The plug is allowed to accelerate through a vacuum region in the washer and then enters into low-density foam as a jet. We have also designed an experiment at larger scale (and thus potentially greater effective spatial resolution) for the Sandia National Laboratory (SNL) Z machine. Preliminary experimental results from both the Omega and the SNL will be presented and compared with post-processed simulations from the AWE, LANL and SNL radiation hydrocodes PETRA, RAGE and ALEGRA. *This work is performed under the auspices of the U. S. Department of Energy by the Los Alamos National Laboratory Laboratory under Contract No. W-7405-ENG-36, Lawrence Livermore National Laboratory under Contract No. W-7405-ENG-48, the Laboratory for Laser Energetics under Contract No. DE-FC03-92SF19460, the Office of Naval Research, and the NASA Astrophysical Theory Grant.

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