Physics
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980scisn..23..607h&link_type=abstract
Scientia Sinica, vol. 23, May 1980, p. 607-621.
Physics
1
Galactic Structure, Gas Dynamics, Interstellar Gas, Shock Wave Propagation, Spiral Galaxies, Disk Galaxies, Galactic Evolution, Gravitational Effects, Interstellar Magnetic Fields, Kinetic Theory, Stellar Gravitation
Scientific paper
The unsteady two-dimensional gasdynamic equations for self-gravitational interstellar gas are calculated; the process of the formation of the galactic shock wave from irregularity of the gas distribution is studied after the gas collapses into the gaseous disk of the protogalaxy. The steady solution of the consistent galactic shock wave with self-gravitational force of interstellar gas is calculated and discussed. It is therefore possible to give a picture of the evolutional process of the galactic spiral structure. A gaseous theory of the galactic spiral structure is presented to explain the origin and evolution of the galactic spiral structure without the aid of perturbed stellar gravitational force. With the picture in mind, many observational phenomena and the evolutional characteristics of a disk-like galaxy can be explained.
Ao Chi
Hu Wayne
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