Mohammed Guhdar

About the Researcher

I am a researcher based in the Kurdistan Region of Iraq, serving as a lecturer at the University of Zakho's College of Science. My primary academic focus lies at the intersection of galactic dynamics, cosmology, and the fundamental properties of the dark sector.

Through rigorous analysis of observational data and astrophysical anomalies, I developed Vacuum Fluid Theory (VFT). My goal is to advance our understanding of the universe by replacing collisionless particle models with a continuous, fluid-based framework that strictly obeys the laws of General Relativity.

Vacuum Fluid Theory (VFT)

For decades, the scientific community has relied on Cold Dark Matter to explain galactic rotation. However, this model predicts infinitely dense central spikes, contradicting observations of smooth, flat cores. VFT proposes a different approach. The dark sector is modeled as a physical fluid with internal pressure. This internal pressure pushes outward against the inward pull of gravity.

This "Tug of War" is mathematically defined by the equation of Hydrostatic Equilibrium:

In this classic framework, \(P\) represents the outward pressure of the fluid, \(\rho\) is the density, and \(\Phi\) is the gravitational potential. This exact balance prevents the dark matter from collapsing into a spike, naturally creating the flat cores we observe in telescopes today. It resolves longstanding anomalies without requiring arbitrary fine-tuning.

Empirical Validation

VFT has been rigorously tested against high-quality observational data, demonstrating significant structural advantages over standard models:

• Unmatched Galactic Accuracy: Tested against 165 galaxies in the SPARC database using a strict protocol, VFT achieved a remarkable predictive accuracy. It mathematically outperforms standard models in fitting observed rotation curves.
• Solving the Core Problem: The theory analytically forces a flat central density core, resolving a persistent crisis in galactic physics entirely through natural fluid dynamics.
• Unifying Cluster Contradictions: VFT explains why dark matter appears to pass through itself in the Bullet Cluster but experiences heavy drag in Abell 520. They represent two thermodynamic states of the exact same fluid. Hot, diffuse states experience no drag, while cold, dense states experience high pressure drag.
• The Dual Signature Confirmation: Observational data confirms that when the fluid is heated, the galaxy's core expands. Conversely, adding heavy baryonic mass from stars crushes the fluid, causing the core to shrink. Standard particle models cannot replicate this simultaneous behavior.

Interactive Dynamics

To visualize how these mathematical principles govern the shape of spacetime, I have developed an interactive VFT Simulation framework.

This simulation allows observers to actively adjust the fluid's temperature and the galaxy's baryonic mass. By watching the spacetime grid react, users can visually experience how hydrostatic equilibrium dictates the structure of a galaxy, transitioning smoothly from the dense funnels of cold halos to the wide bowls of hot, diffuse regimes.

Cosmological Predictions

A robust theoretical framework must make bold, falsifiable predictions. VFT establishes its foundations in the early universe with two major milestones:

• The JWST Core Evolution Test: VFT predicts that early dark matter cores must evolve according to a strict power law. As the James Webb Space Telescope maps the kinematic structures of ancient galaxies, measuring this exact slope will serve as a definitive observational test for the theory.
• The Cosmic Phase Transition: To align with the perfect mathematics of the Cosmic Microwave Background, VFT dictates that the dark sector underwent a thermodynamic phase transition shortly before Recombination. The fluid shifted from a pressureless state to the pressure-supported state we observe today.