Oscillatory instability of radiative shocks with multiple cooling processes

Details Oscillatory instability of radiative shocks with multiple cooling processes Oscillatory instability of radiative shocks with multiple cooling processes

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.299..862s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 299, Issue 3, pp. 862-876.

Astronomy and Astrophysics

Astronomy

16

Accretion, Accretion Discs, Shock Waves, Binaries: Close, White Dwarfs

Scientific paper

The stand-off shock formed in the accretion flow on to a stationary wall, such as the surface of a white dwarf, may be thermally unstable, depending on the cooling processes which dominate the post-shock flow. Some processes lead to instability, while others tend to stabilize the shock. We consider competition between the destabilizing influence of thermal bremsstrahlung cooling, and a stabilizing process which is a power law in density and temperature. Cyclotron cooling and processes which are of order 1, 3/2 and 2 in density are considered. The relative efficiency and power-law indices of the second mechanism are varied, and particular effects on the stability properties and frequencies of oscillation modes are examined.

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