The Redshift-Dependence of Radial Acceleration: Modified Gravity versus Particle Dark Matter

Autor:	Hossenfelder, Sabine, Mistele, Tobias
Rok vydání:	2018
Předmět:	General Relativity and Quantum Cosmology Astrophysics - Astrophysics of Galaxies
Druh dokumentu:	Working Paper
DOI:	10.1142/S0218271818470107
Popis:	Modified Newtonian Dynamics has one free parameter and requires an interpolation function to recover the normal Newtonian limit. We here show that this interpolation function is unnecessary in a recently proposed covariant completion of Erik Verlinde's emergent gravity, and that Verlinde's approach moreover fixes the function's one free parameter. The so-derived correlation between the observed acceleration (inferred from rotation curves) and the gravitational acceleration due to merely the baryonic matter fits well with data. We then argue that the redshift-dependence of galactic rotation curves could offer a way to tell apart different versions of modified gravity from particle dark matter. Comment: 7 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1803.08683 Zobrazit plný text záznamu View this record from Arxiv