The time evolution of an ionization front

Details The time evolution of an ionization front The time evolution of an ionization front

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976a%26a....53..411t&link_type=abstract

(European Conference on Astronomy, Leicester, England, Aug. 1975.) Astronomy and Astrophysics, vol. 53, no. 3, Dec. 1976, p. 411

Astronomy and Astrophysics

Astrophysics

31

Gas Ionization, Hydrogen Clouds, Interstellar Gas, Shock Fronts, Astronomical Models, Equations Of Motion, Gas Dynamics, Shock Wave Propagation, Time Dependence

Scientific paper

The evolutionary development of an ionization front (I-front) is investigated by carrying out a numerical computation that clearly shows all the particular features which link together the various types of I-fronts from the beginning to the end of their evolution under a realistic set of boundary conditions. The differential gasdynamic equations needed to construct dynamical models are solved numerically using a simultaneous iteration method for the plane-parallel case of an undisturbed gas, and the temporal evolution of a very fast but weak R-front is examined. The evolution is traced through the phases of a strong D-front, a critical D-front, and a weak D-front (the end of evolution). The results indicate that the shock, not the I-front, produces the main mechanical effect on the gas. A seven-stage evolutionary sequence is outlined.

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