Linear Potentials and Galactic Rotation Curves - Representative Fitting

Details Linear Potentials and Galactic Rotation Curves - Representative Fitting Linear Potentials and Galactic Rotation Curves - Representative Fitting

1993-07-02

arxiv.org/abs/astro-ph/9307003v1

Astronomy and Astrophysics

Astrophysics

UCONN-92-3, 14 pages (plus 1 figure - send requests to mannheim@uconnvm.bitnet), in plain TeX. (This is an updated version of

Scientific paper

We present a simple, closed form expression for the potential of an axisymmetric disk of stars interacting through gravitational potentials of the form $V(r)=-\beta /r+\gamma r/2$, the potential associated with fundamental sources in the conformal invariant fourth order theory of gravity which has recently been advanced by Mannheim and Kazanas as a candidate alternative to the standard second order Einstein theory. Using the model we obtain a reasonable fit to some representative galactic rotation curve data without the need for any non-luminous or dark matter. Our study suggests that the observed flatness of rotation curves might only be an intermediate phenomenon rather than an asymptotic one.

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