TITLE:
The Role of the Hubble Parameter in Galactic Rotation Curves and Spiral Morphology
AUTHORS:
Egbertus Paulus Johannes de Haas
KEYWORDS:
Alternative Gravity Theory, Quantum Gravity, Space Quantisation, Dark Matter, Dark Energy, Hubble Expansion
JOURNAL NAME:
Journal of High Energy Physics, Gravitation and Cosmology,
Vol.11 No.4,
October
27,
2025
ABSTRACT: We investigate the influence of the Hubble parameter
H(
z
)
on galactic dynamics and morphology. By introducing the cosmic expansion as an effective limit on Newtonian gravitation, we obtain a redshift-dependent critical radius that constrains both spiral structure and rotation curves. Galactic bars are interpreted as frozen spirals of high-
z
epochs nested inside extended low-
z
spirals. This framework naturally explains the coexistence of bulges, bars, disks and halos as the outcome of metric inflow and bulge reset events. The resulting morphology and kinematics provide a direct and testable connection between galactic structure and the cosmic expansion. We argue that this approach opens a new possibility to empirically derive
H(
z
)
from galaxy morphology and rotation curves and allows reconstructing the expansion history of the universe on galactic scales.