1. Introduction
The persistent discrepancy between observed galactic rotation curves and predictions from Newtonian dynamics based on visible matter has led to the widespread adoption of dark matter as a necessary component of cosmological models. While phenomenologically successful, the particle dark matter hypothesis has yet to yield direct detection after decades of experimental effort.
This work proposes an alternative: the observed gravitational anomalies arise not from undetected particles, but from the intrinsic dynamics of two-dimensional energy fields that permeate spacetime in the Dimensional Relativity framework. These fields, oscillating at characteristic frequencies near 1.5 × 1013 Hz, contribute additional terms to the Einstein-Hilbert action that modify gravitational behavior on galactic scales.
We derive the modified field equations from first principles and demonstrate that they reproduce flat rotation curves, the Tully-Fisher relation, and the observed distribution of gravitational effects attributed to dark matter — all without invoking new particles.
2. Theoretical Framework
In Dimensional Relativity, spacetime is augmented by two-dimensional energy manifolds characterized by finite energy density E0 ≈ 10−20 J distributed over surfaces with topology-dependent configurations (flat sheets, tori, compactified tubes). These fields oscillate at frequency
The Lagrangian density for the 2D field is
where φ represents the scalar amplitude of the 2D field, and the final term couples the field directly to spacetime curvature.
3. Modified Einstein-Hilbert Action
The total action is
Varying with respect to the metric yields the modified field equations:
where the 2D field stress-energy tensor is
4. Galactic Rotation Curves
For a spherically symmetric, static metric
the 2D field contribution produces an effective potential that, at large radii, yields
where α is determined by the amplitude and coupling of the 2D field. This naturally produces the observed flat rotation curves for r ≫ r0, where r0 is the scale at which 2D field effects dominate.
5. Cosmological Implications
The 2D field contribution scales as ρ ∝ a−2 during matter domination, providing a natural explanation for the observed acceleration of cosmic expansion without a cosmological constant. The effective dark energy density is
This predicts a transition from deceleration to acceleration at z ≈ 0.7, consistent with supernova observations.
6. Discussion
The Dimensional Relativity framework eliminates the need for both particle dark matter and fine-tuned cosmological constants by interpreting gravitational anomalies as manifestations of intrinsic spacetime structure. The theory is falsifiable through:
- Detection of predicted 1.5 × 1013 Hz oscillations in high-precision gravitational experiments
- Absence of dark matter particle detections at predicted mass ranges
- Precision tests of rotation curves in dwarf galaxies
7. Conclusion
We have presented a modified theory of gravity based on the inclusion of two-dimensional energy fields in the Einstein-Hilbert action. The resulting field equations naturally reproduce all major phenomena currently attributed to dark matter and dark energy, offering a unified geometric explanation rooted in the fundamental structure of spacetime itself.