Rotating and counter-rotating cores in elliptical galaxies

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Counter Rotation, Elliptical Galaxies, Galactic Rotation, Angular Momentum, Brightness Distribution, Galactic Evolution, Galactic Structure, Velocity Distribution

Scientific paper

It is suggested that rotating cores such as those (both rotating and contrarotating) presently discovered in four out of seven slowly-rotating elliptical galaxies may exist in a large portion of elliptical galaxies. Attention is given to such possible explanations for contrarotation as the merging of galaxies and the counterspin-up of the galaxies' outer regions due to interactions in the early stages of galactic formation. The four galaxies discussed are NGCs 4365, 4406, 4494, and 5322.

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