On the nature of the 'branching' spiral structure of galaxies

Details On the nature of the 'branching' spiral structure of galaxies On the nature of the 'branching' spiral structure of galaxies

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53..488m&link_type=abstract

Astronomicheskii Zhurnal, vol. 53, May-June 1976, p. 488-494. In Russian.

Physics

Astronomical Models, Density Wave Model, Galactic Structure, Spiral Galaxies, Angular Velocity, Branching (Physics), Hydrodynamic Equations, Kinetic Equations, Rotating Disks

Scientific paper

The large-scale branching of spiral arms observed in some galaxies is explained in terms of density-wave theory. It is shown that solutions to the dispersion equation of spiral density waves relative to wave number for galaxy models in the form of two disks rotating with different angular velocities under specific conditions are branching functions of galactocentric distance, with corresponds to branching of spiral arms. Hydrodynamic as well as kinetic approaches are used. The latter enables a number of other structural features of spiral galaxies to be understood.

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