# Exact Recession Velocity and Cosmic Redshift Based on Cosmological Principle and Yang-Mills Gravity

## TL;DR

This paper derives an exact formula for recession velocity and cosmic redshift based on the cosmological principle and Yang-Mills gravity, providing a new theoretical framework consistent with observations at small velocities.

## Contribution

It introduces a novel cosmic model using Yang-Mills gravity to precisely calculate recession velocities and redshifts, extending beyond traditional approximations.

## Key findings

- Derived an exact recession velocity formula less than the speed of light.
- Predicted cosmic redshift relationship consistent with observed data.
- Established a transformation for wave vectors between inertial and accelerated frames.

## Abstract

Based on the cosmological principle and quantum Yang-Mills gravity in the super-macroscopic limit, we obtain an exact recession velocity and cosmic redshift z, as measured in an inertial frame $F\equiv F(t,x,y,z).$ For a matter-dominated universe, we have the effective cosmic metric tensor $G_{\mu\nu}(t)=(B^2(t),-A^2(t),-A^2(t),-A^2(t)), \ A\propto B\propto t^{1/2}$, where $t$ has the operational meaning of time in $F$ frame. We assume a cosmic action $S\equiv S_{cos}$ involving $G_{\mu\nu}(t)$ and derive the `Okubo equation' of motion, $G^{\mu\nu}(t)\partial_\mu S \partial_\nu S - m^2=0$, for a distant galaxy with mass $m$. This cosmic equation predicts an exact recession velocity, $\dot{r}=rH/[1/2 +\sqrt{1/4+r^2H^2/C_o^2} ]<C_o$, where $H=\dot{A}(t)/A(t)$ and $C_o=B/A$, as observed in the inertial frame $F$. For small velocities, we have the usual Hubble's law $\dot{r} \approx rH$ for recession velocities. Following the formulation of the accelerated Wu-Doppler effect, we investigate cosmic redshifts z as measured in $F$. It is natural to assume the massless Okubo equation, $G^{\mu\nu}(t)\partial_\mu \psi_e \partial_\nu \psi_e=0$, for light emitted from accelerated distant galaxies. Based on the principle of limiting continuation of physical laws, we obtain a transformation for covariant wave 4-vectors between and inertial and an accelerated frame, and predict a relationship for the exact recession velocity and cosmic redshift, $z=[(1+V_r)/(1-V_r^2)^{1/2}] - 1$, where $V_r=\dot{r}/C_o<1$, as observed in the inertial frame $F$. These predictions of the cosmic model are consistent with experiments for small velocities and should be further tested.