Other
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...390..447s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 390, no. 2, May 10, 1992, p. 447-453. Research supported by MPI.
Other
10
Interstellar Gas, Magnetohydrodynamic Waves, Molecular Clouds, Shock Waves, Supersonic Flow, Approximation, Magnetic Fields, Magnetohydrodynamics, Parallel Flow
Scientific paper
Consideration is given to magnetohydrodynamic shock waves in molecular clouds; plane-parallel flows with oblique magnetic fields are analyzed with particular regard to switch shocks. In molecular clouds these shocks become continuous, or C-type, here termed C-switches. C-switches are found to yield both strong compression and large swings in the magnetic field direction. The requirements under which they arise are enumerated. The temperature profile across an oblique shock is derived using the cool C-shock method. A formula which determines the transverse shock of equivalent excitation is presented. C-switch behavior influences flows within an angle of about 1/A of the field direction. Switch-off C-shocks, in which the field pressure generated by the switch-on shock is converted into thermal pressure as the transverse field disappears, are also discussed. An approximate isothermal solution is found.
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