Galaxy rotation curves in superfluid vacuum theory

TL;DR

This paper tests a superfluid vacuum theory predicting multiple gravitational regimes by fitting galaxy rotation curves, finding close agreement with observations across diverse galactic profiles.

Contribution

It applies a novel superfluid vacuum theory to galactic rotation data, demonstrating its potential to explain gravitational phenomena without dark matter.

Findings

The theory fits rotation curves well across different galaxy types.

Results are sensitive to stellar disk model assumptions.

Close match with observational data even for non-flat rotation profiles.

Abstract

Logarithmic superfluid theory of physical vacuum suggests that gravity has a multiple-scale structure; where one can recognize sub-Newtonian, Newtonian, logarithmic, linear and quadratic (de Sitter) terms in the induced spacetime metric and effective potential. To test the theory's predictions on a galactic scale, we apply best-fitting procedures to the rotation curve data obtained from fifteen galaxies by the HI Nearby Galaxy Survey; assuming their stellar disk's parameters to be fixed to the mean values measured using photometric methods. Although the fitting results seem to be sensitive to a stellar disk model chosen, they correspond closely with observational data, even for those galaxies which rotation velocity profiles do not have flat regions.