The barred spiral structure of galaxies

Details The barred spiral structure of galaxies The barred spiral structure of galaxies

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984cha%26a...8..168c&link_type=abstract

Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 8, June 1984, p. 168-172. Translation.

Astronomy and Astrophysics

Astrophysics

Barred Galaxies, Galactic Structure, Gas Dynamics, Differential Equations, H Lines, Integral Transformations, Spiral Galaxies

Scientific paper

An analytical model of galaxies with rigidly rotating bars is presented and compared with observational data. The galaxy is modeled as a self-gravitating gas disk expressed in terms of gasdynamic equations. The bar-spiral structure is treated as a wave pattern maintained by a bar-spiral gravitational field. The density distribution decreases exponentially outwards from the galactic center. Small disturbances from the base state are caused by relative rotations of the bar and disk. An integral transformation technique is used to obtain a self-consistent solution around the contour of the disk. Applied to observational data, the varying morphologies of SBa, SBb and SBc galaxies are attributed to different base states. Data also support the concept that the density thins with distance outward.

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