String Theory Explanation of Galactic Rotation Found Using the Geodesic Constraint

الملخص EN

The unique spherically symmetric metric which has vanishing Weyl tensor, is asymptotically de-Sitter, and can model constant galactic rotation curves is presented.

Two types of field equations are shown to have this metric as an exact solution.

The first is Palatini varied scalar-tensor theory.

The second is the low energy limit of string theory modified by inclusion of a contrived potential.