2015/03/25 by Seiji Zenitani · 1 citation
Physics and Astronomy · #astro-ph.SR #physics.plasm-ph #physics.space-ph
paper · pdf · doi:10.1063/1.4916104
published as Physics of Plasmas, 22, 032114 (2015) · 18 pages, 6 figures; fortran 90 code is attached; see ancillary files in the "Other formats" link
arxiv created 2015/03/25 · arxiv updated 2015/03/26
The shock structure of a plasmoid in magnetic reconnection in low-beta plasmas is investigated by two-dimensional magnetohydrodynamic simulations. Using a high-accuracy code with unprecedented resolution, shocks, discontinuities, and their intersections are resolved and clarified. Contact discontinuities emanate from triple-shock intersection points, separating fluids of different origins. Shock-diamonds inside the plasmoid appear to decelerate a supersonic flow. New shock-diamonds and a slow expansion fan are found inside the Petschek outflow. A sufficient condition for the new shock-diamonds and the relevance to astrophysical jets are discussed.