Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....76..318c&link_type=abstract
Astronomy and Astrophysics, vol. 76, no. 3, July 1979, p. 318-323. Research supported by the Consejo Nacional de Ciencia y Tecn
Astronomy and Astrophysics
Astrophysics
3
Electron Gas, Interstellar Gas, Neutral Gases, Shock Fronts, Compressing, Electron Energy, Heavy Ions, Hydrodynamic Equations, Hydrogen Atoms, Ionization Cross Sections, Ionized Gases
Scientific paper
The development of a shock front at times less than a characteristic time between the start of the shock motion and the time at which ionizing photons are produced in the shock is followed by decomposing the shock structure into two regions, viz., a compression shock and a relaxation zone. A steady-state formulation is used in which the assumption that atoms and ions have the same temperature as electrons is of necessity relaxed. Steady-state plane-parallel flow equations are derived and applied to the specific case of a shock with a velocity of 100 km/s moving into a monatomic, essentially neutral, gas with a hydrogen number density of 100 per cu cm. The flow is followed after the shock starts and for times less than the cited characteristic time. Some extrapolations are made which indicate that the characteristic time may be appreciable for low shock velocities and preshock densities.
Cantó Jorge
Dyson John E.
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