INVESTIGATIONS OF THEORETICAL PROBLEMS IN COSMICAL GAS DYNAMICS.
Final rept. 1 Jan-31 Dec 65,
CHICAGO UNIV ILL DEPT OF ASTRONOMY
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Various aspects of the evolution of H II regions gaseous nebulae surrounding newly formed stars of early spectral types were examined. The evolution of an H II region during the formation of the exciting star was considered, and it is shown that there are two modes of evolution. Physical processes governing the temperature structure and ionization structure of an H II region and an ionization front were investigated. Corrections to the growth rates for the instability of an ionization front were computed. There was an unsuccessful attempt to construct a statistical mechanics of sound waves in an isothermal gas. Author