The Galactic Mass Discrepancy-Acceleration Relation (MDAR) and Implications for Galaxy Formation and Cosmology
Year: 2016
Type: article
Abstract: We present the first spatially resolved Mass Discrepancy-Acceleration Relation (MDAR) for the Galaxy as determined from high- resolution stellar kinematics. The physically obtained MDAR exhibits a rich complexity with substructure reflecting the true dynamics of the Galactic system. The results contradict the presence of a massive extended dark matter halo in lieu of a baryonic solution. We compare the effective baryonic fraction as a function of radius (>200 kpc) demonstrating nearly all Galactic so called missing mass originates in and around the immediate vicinity of the baryonic disk. We argue that nearly all disk galaxies are a product of relativistic dynamics and baryonically derived gravitational forces existing during primordial assembly of the Galaxy. Our cosmological proposition is buttressed by recent stellar chemical analysis suggesting two-phase galactic assembly that uniquely matches our kinematic observations and theoretical considerations that are consistent with this formation proposal.
Source: The Winnower
Author: Jeffrey M. La Fortune
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2539832420