Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238..235s&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, May 1, 1989, p. 235-252.
Astronomy and Astrophysics
Astrophysics
11
Astrophysics, Magnetic Fields, Radiant Cooling, Shock Layers, Shock Wave Propagation, Thermal Instability, Herbig-Haro Objects, Interstellar Matter, Radiation Pressure, Stellar Winds, Supernova Remnants
Scientific paper
The effects of magnetic cushioning on unsteady shock phenomena are calculated, including thermal instability, secondary shocks, and the catastrophic cooling instability. It is found that, as the magnetic field increases during the collapse of the layer, the criteria for the growth of density and temperature perturbations diverge. In addition, the consequences of magnetic cushioning for shocks associated with stellar winds, Herbig-Haro objects, and supernova remnants are discussed. The results suggest that shock velocities greater than 200 km/s are needed for instabilities to lead to secondary shocks in a cooling layer.
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