Statistics – Computation
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.112..225n&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 112, no. 2, May 1985, p. 225-249.
Statistics
Computation
60
Computational Astrophysics, Expansion, Interstellar Matter, Stellar Cores, Stellar Envelopes, Hydrodynamics, Radio Emission, Shock Waves, Spatial Distribution, Supernovae, Taylor Instability, X Ray Sources
Scientific paper
In the present investigation of deceleration in the circumstellar medium of a stellar envelope thrown off by a shock wave, the equations of spherical-symmetric, adiabatic hydrodynamics are noted to have a similarity solution where the expanding envelope density is approximated by a reasonable power law. The characteristics of the similarity solution are calculated for various exponents in the density laws of an expanding envelope and circumstellar matter, and for two values of the adiabatic index. Attention is given to the validity of the hydrodynamics; it is concluded, in agreement with D'yachenko et al. (1969), that the kinetic and collisionless processes are of great importance if the initial stages of stellar envelope deceleration are to be properly monitored. The results obtained are of interest for explosive nucleosynthesis.
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