Disk and elliptical galaxies within renormalization group improved gravity

TL;DR

This paper explores how infrared quantum effects, modeled through renormalization group corrections to gravity, can explain galaxy rotation curves without dark matter, showing promising results for elliptical and disk galaxies.

Contribution

It introduces the RGGR model applying quantum corrections to gravity, providing a new approach to galaxy dynamics that matches observed rotation curves without dark matter.

Findings

RGGR can fit galaxy rotation curves with minimal variation in G

The model successfully describes elliptical galaxy NGC 4374

It also explains dwarf disk galaxy DDO 47 dynamics

Abstract

The paper is about possible effects of infrared quantum contributions to General Relativity on disk and elliptical galaxies. The Renormalization Group corrected General Relativity (RGGR model) is used to parametrize these quantum effects. The new RGGR results presented here concern the elliptical galaxy NGC 4374 and the dwarf disk galaxy DDO 47. Using the effective approach to Quantum Field Theory in curved background, one can argue that the proper RG energy scale, in the weak field limit, should be related to the Newtonian potential. In the context of galaxies, this led to a remarkably small variation of the gravitational coupling G, while also capable of generating galaxy rotation and dispersion curves of similar quality to the the best dark matter profiles (i.e., the profiles that have a core).