Flat rotation curves in Chern-Simons modified gravity

TL;DR

This paper explores how Chern-Simons modified gravity can explain galaxy rotation curves without dark matter by analyzing the spacetime of a slowly rotating black hole, offering an alternative to dark matter explanations.

Contribution

It presents a new solution for rotating spacetime in Chern-Simons gravity that accounts for flat galaxy rotation curves, challenging dark matter paradigms.

Findings

Frame-dragging effects extend over long ranges in Chern-Simons gravity.

The solution explains flat galaxy rotation curves without dark matter.

Provides an alternative rotating spacetime scenario differing from G"odel's solution.

Abstract

We investigate the spacetime of a slowly rotating black hole in the Chern-Simons modified gravity. The long range feature of frame-dragging effect under the Chern-Simon gravity well explains the flat rotation curves of galaxies which is a central evidence of dark matter. Our solution provides a different scenario of rotating space from Goedel's solution.