Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21442505s&link_type=abstract
American Astronomical Society, AAS Meeting #214, #425.05; Bulletin of the American Astronomical Society, Vol. 41, p.695
Astronomy and Astrophysics
Astrophysics
Scientific paper
Highly supersonic, magnetized flows occur in a variety of astrophysical environments, including star-forming molecular clouds, planetary nebulae and supernova remnants. However, the typical astrophysical medium is inhomogeneous, with clumpy condensations arising on a variety of scales. These inhomogeneities may arise because of initial fluctuations of the ambient mass distribution, the action of instabilities, variations in the flow source, etc. Regardless of the origin of the clumps, it is clear that they have a dramatic affect on supersonic flow propagation. So far, the bulk of the research done on mass outflows has focused on flows in homogeneous media, and none of the studies has considered the effect of magnetic fields in a clumpy environment. In this study we consider the effect a clumpy environment on the propagation of an initially planar wind in a magnetized medium. The inhomogeneities are represented as spherical clumps embedded in a stationary medium, which carries a uniform magnetic field. Of particular interest to us is the effect of the field's direction relative to the wind, as well as that of the packing density of the clumps. The research is being done with AstroBEAR, an adaptive mesh refinement code used to solve magnetohydrodynamic equations.
Carroll Jonathan J.
Cunningham Andrew J.
Frank Alejandro
Jones Tom
Poludnenko Alexei
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