Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aipc..144..242i&link_type=abstract
IN: Magnetospheric phenomena in astrophysics (A87-11753 02-90). New York, American Institute of Physics, 1986, p. 242-249. DOE-s
Astronomy and Astrophysics
Astrophysics
Interstellar Matter, Magnetohydrodynamic Stability, Shock Waves, Supernova Remnants, Astronomical Models, Oscillations, Plasma Cooling
Scientific paper
Observations of the radiative shock waves produced during the late stages of supernova remnant evolution cannot be understood in the context of steady state shock models. As a result, several more complicated scenarios have been suggested. For example, it has been proposed that several shocks are producing the emission or that one shock, which is in the process of making the transition between the adiabatic and the radiative phases of its evolution, produces the emission. In this paper, another explanation is suggested. It is proposed that supernova remnant shock waves are subject to an oscillatory instability. By an oscillatory instability, it is meant one where the postshock cooling region periodically varies in size on a time scale determined by the postshock plasma cooling time. An oscillatory instability may be able to produce the types of behavior exhibited by supernova remnant radiative shocks in a natural way.
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