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Astron. Astrophys. 361, 53-59 (2000)


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A model of a steadily rotating prolate galaxy in Newtonian theory

P.S. Florides 1 and N.K. Spyrou 2

1 Trinity College, School of Mathematics, University of Dublin, Dublin 2, Ireland (florides@maths.tcd.ie)
2 Astronomy Department, University of Thessaloniki, 540.06 Thessaloniki, Macedonia, Greece (spyrou@helios.astro.auth.gr)

Received 10 December 1999 / Accepted 17 June 2000

Abstract

A model of a prolate galaxy in constructed within the framework of Newtonian theory of gravity. The model consists of a central perfect-fluid gravitating prolate spheroid rotating steadily about its axis of symmetry and two galaxies of equal masses, which are situated on the prolate spheroid's axis of symmetry and at equal distances from its centre on either of its sides. It is shown that for physically acceptable ranges of the values of the masses of the two companion galaxies and of their distances from the prolate spheroid's centre such a model is possible in Newtonian theory. The astrophysical significance of the model is discussed as well as the fact that its existence can be verified observationally.

Key words: hydrodynamics – galaxies: kinematics and dynamics

Send offprint requests to: N.K. Spyrou

© European Southern Observatory (ESO) 2000

Online publication: September 5, 2000

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