$R^n$ gravity is kicking and alive: the cases of Orion and NGC 3198

TL;DR

This study demonstrates that $R^n$ gravity, a modified gravity theory, can effectively explain the rotation curves of the dwarf galaxy Orion and NGC 3198 without dark matter, outperforming traditional dark matter models.

Contribution

It provides evidence that $R^n$ gravity can fit galaxy rotation curves better than $ ext{ extLambda}$CDM dark matter models, challenging standard cosmological assumptions.

Findings

$R^n$ gravity fits rotation curves without dark matter.

Better performance than $ ext{ extLambda}$CDM models.

Supports $R^n$ gravity as a viable alternative.

Abstract

We analyzed the Rotation Curves of two crucial objects, the Dwarf galaxy Orion and the low luminosity Spiral NGC 3198, in the framework of $R^n$ gravity. We surprisingly found that the no DM power-law f(R) case fits them well, performing much better than $\Lambda$CDM Dark Matter halo models. The level of this unexpected success can be a boost for $R^n$ gravity.