Role of the spherical subsystem in the formation of the spiral structure of galaxies

Details Role of the spherical subsystem in the formation of the spiral structure of galaxies Role of the spherical subsystem in the formation of the spiral structure of galaxies

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53..206m&link_type=abstract

Astronomicheskii Zhurnal, vol. 53, no. 1, 1976, p. 206-208. In Russian.

Astronomy and Astrophysics

Astrophysics

2

Astrophysics, Galactic Structure, Spiral Galaxies, Stellar Motions, Density Distribution, Milky Way Galaxy, Star Distribution

Scientific paper

It is shown that because of the large dispersion in the velocities of stars of the spherical (nonrotating) subsystem, the role of this subsystem in the dynamics of spiral density waves in the Galaxy turns out to be insignificant. By reexamining the study of Marochnik et al. (1972), in which the spherical subsystem was approximated by a thin disk and which the smallness of the role of the spherical subsystem in the dynamics of spiral waves was shown, it is demonstrated that taking into account the finite thickness of the spherical subsystem leads to an additional diminution of its role. Thus, the spiral structure of the Galaxy is determined solely by the parameters of the flat (rotating) subsystem.

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