The rotation of elliptical galaxies - an application of the theory of tidal torques

Details The rotation of elliptical galaxies - an application of the theory of tidal torques The rotation of elliptical galaxies - an application of the theory of tidal torques

Jan 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...264..408l&link_type=abstract

Astrophysical Journal, Part 1, vol. 264, Jan. 15, 1983, p. 408-412.

Astronomy and Astrophysics

Astrophysics

6

Elliptical Galaxies, Galactic Rotation, Galactic Structure, Flattening, Tides, Torque

Scientific paper

The theory of tidal torques predicts a variation in the degree of rotational flattening with mass. It is shown that the effect of dissipation enhances this trend. This model and the extrapolation of observational results predicts that low-luminosity ellipticals should be rotationally flattened. If the hypothesis is adopted that the difference between the rotational properties of ellipticals and the bulges of spiral galaxies is that of self-gravitating collapse versus collapse through a halo, then the inferred collapse factor is approximately 10.

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