The rotation curve of a point particle in stringy gravity

Understand

Double Field Theory suggests to view the whole massless sector of closed strings as the gravitational unity.

• The fundamental symmetries therein, including the $\mathbf{O}(D,D)$ covariance, can determine unambiguously how the Standard Model as well as a relativistic point particle should couple to the closed string massless sector.
• The theory also refines the notion of singularity.
• We consider the most general, spherically symmetric, asymptotically flat, static vacuum solution to ${D=4}$ Double Field Theory, which contains three free parameters and consequently generalizes the Schwarzschild geometry.