Dark galactic halos without dark matter

TL;DR

This paper proposes that conformal gravity, constrained by Weyl symmetry, can explain galactic rotation curves and gravitational lensing without dark matter, by considering the effects of primordial matter condensation and cosmic background vacuums.

Contribution

It introduces a conformal gravity framework that accounts for galactic phenomena traditionally attributed to dark matter, without requiring additional unseen matter.

Findings

Conformal theory explains galactic rotation without dark matter.

Gravitational lensing is accounted for by conformal gravity effects.

Structural stabilization of galaxies is consistent with the proposed model.

Abstract

Using standard Einstein theory, baryonic mass cannot account for observed galactic rotation velocities and gravitational lensing, attributed to galactic dark matter halos. In contrast, theory constrained by Weyl conformal scaling symmetry explains observed galactic rotation in the halo region without invoking dark matter. An explanation of dark halos, gravitational lensing, and structural stabilization, without dark matter and consistent with conformal theory, is proposed here. Condensation of uniform primordial matter into a material cloud or galaxy vacates a large surrounding spherical halo. Within such an extended vacancy in the original cosmic background mass-energy density, conformal theory predicts centripetal acceleration of the observed magnitude.