Physics
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1809z&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 18, Oct. 1991, p. 1809-1812.
Physics
7
Bow Waves, Giacobini-Zinner Comet, Halley'S Comet, Magnetohydrodynamics, Shock Waves, Solar Wind, Computerized Simulation, Gas Dynamics, Magnetization, Rankine-Hugoniot Relation
Scientific paper
Recent observations at comets Giacobini-Zinner and Halley suggest that simple nonreacting gas dynamics or MHD is an inappropriate description for the bow shock. The thickness of the observed (sub)shock implies that mass-loading is an important dynamical process within the shock itself, thereby requiring that the Rankine-Hugoniot conditions possess source terms. This leads to shocks with properties similar to those of combustion shocks. The paper considers parallel magnetized shocks subjected to mass-loading, describes some properties which distinguish them from classical MHD parallel shocks, and establishes the existence of a new kind of MHD compound shock. These results will be of importance both to observations and numerical simulations of the comet-solar wind interaction.
Neubauer Fritz Manfred
Oughton Sean
Webb Gary M.
Zank Gary P.
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