A quasi-stable stellar system with prolate inner and oblate outer parts

Details A quasi-stable stellar system with prolate inner and oblate outer parts A quasi-stable stellar system with prolate inner and oblate outer parts

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.202.1159g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 202, Mar. 1983, p. 1159-1167. Research supported by the Studienstiftung

Mathematics

Logic

20

Elliptical Galaxies, Galactic Structure, Periodic Variations, Spiral Galaxies, Star Distribution, Stellar Models, Stellar Systems, Anisotropy, Galactic Evolution, Hubble Constant, Many Body Problem, Prolateness, Radial Velocity, Spatial Distribution, Stellar Evolution

Scientific paper

The author shows that a stellar system whose morphological structure changes radially from prolate via triaxial to oblate is quasi-stable for 17 crossing times. This configuration is dynamically supported by corresponding radial changes in its velocity anisotropy. The shapes of projected ellipticity profiles of this model take a variety of forms and resemble some observed profiles of elliptical galaxies. Large apparent position angle gradients are common. By way of construction of the model, merging appears to be a promising process for forming elliptical galaxies with ellipticity gradients and isophote twists.

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