Statistics – Computation
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aca....43..235p&link_type=abstract
Acta Astronomica, vol. 43, no. 3, p. 235-248
Statistics
Computation
6
Astronomical Models, Hydrodynamics, Interstellar Matter, Shock Waves, Supernova Remnants, Computational Grids, Cooling Flows (Astrophysics), Shock Wave Interaction, Ultraviolet Radiation
Scientific paper
High resolution hydrodynamical models of plane-parallel fast radiative shocks are presented. A quasiperiodic evolution of the shocks is found. Approximate spectra of the shocks reveal a fast variability of ultraviolet radiation caused by highly discontinuous flow within regions of emission. We found two types of evolution during the first cooling episode: cooling waves sweep through the shocked gas for shocks initially slower than approximately 1500 km/s, while for higher shock velocities secondary shocks reflect from the front of dense shell formed at base of post-shock region. The second cooling episode starts with reflection of the main shock directly from the shell or after collision with the secondary shock. The subsequent evolution of the shocks is quasiperiodic with significant contribution of stochastic component due to highly discontinuous character of the flow in the post-main shock region.
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