Other
Scientific paper
Apr 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aps..apr.k1210z&link_type=abstract
American Physical Society, APS/AAPT Joint Meeting, April 18-21, 1997, abstract #K12.10
Other
Scientific paper
The recent observations by Egger, Aschenbach and Trumper of ``explosion fragments'' outside the Vela supernova remnant and ``cosmic knots,'' observed near jets, prompts a vortex dynamical interpretation. They are coherent ``escaped vortex projectiles'' or EVPs that have moved remotely from their source of origin. This proposition is supported by the following : When a shock wave strikes a density inhomogeneity (e.g. cloud interface) it deposits layers of vorticity that are unstable. They may roll-up and ``bind'' to form ``double-ring'' structures (as discussed in the previous abstracts). In 3D, these vortex structures can cascade to smaller rings, as described next; (2) We exhibit relevant experiments and numerical simulations that show that tubes of vortex lines in three dimensions frequently collapse toward each other in anti-parallel configurations which lead to reconnection and the formation of separated ``ring-like'' structures which persist for long times in weakly dissipative environments. These structures have ``mushroom'' morpholgies and they or their cascade products are the ``knots'' that have been observed.
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