Physics
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934909l&link_type=abstract
American Astronomical Society, AAS Meeting #219, #349.09
Physics
Scientific paper
Problems involving magnetized clouds and clumps, especially their interaction with shocks are crucial in astrophysical context and have been thoroughly studied in the past decade. Many previous numerical studies focus on the problem of clumps placed in a global uniform magnetic field run through by a shock. However, the realistic clumps usually have tangled magnetic field centralized inside them. The difficulty in such a study is that it is hard for the numerically created clumps to sustain themselves under such circumstance, especially with low magnetic beta. AstroBEAR is a parallel MHD code with adaptive mesh refinement. With the new AstroBEAR code, it is possible to create self-sustained clumps with tangled magnetic field residing inside them. Moreover, the recently built in multi-physics functionality allows us to incorporate realistic micro-physics resistivity and viscosity in the simulation thus allowing for more realistic treatment to the magnetized clump problem. In this study, we examine the long term evolution of self-sustained magnetized clumps with centralized tangled magnetic field and their interaction with shocks.
Frank Alejandro
Li Shule
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