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Disk and elliptical galaxies within renormalization group improved gravity

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arxiv 1209.0504 v1 pith:VVFSVQZC submitted 2012-09-03 astro-ph.CO astro-ph.GAgr-qc

Davi C. Rodrigues , Paulo L. C. de Oliveira , Julio C. Fabris , Ilya L. Shapiro This is my paper · ORCID
classification astro-ph.COastro-ph.GAgr-qc
keywords diskellipticalgalaxiesgalaxyquantumeffectsfieldgeneral
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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).

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  1. Exploring velocity dispersion anisotropy in a dark matter dominated ultra-diffuse galaxy with modified gravity models

    astro-ph.CO 2024-12 conditional novelty 4.0 of 10

    For NGC1052-DF44, MOND and RGGR modified gravity fits with free orbital anisotropy match the observed velocity dispersion as well as an NFW dark matter halo.

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