Thursday, January 29, 2009

"Radius 1c", Depiction of the Derivative of Exponential Deceleration


In the next post, I give the last figure. There, the plot represents the result of taking the first derivative of the exponential expansion equation that shows deceleration in the modern epoch. Looking at a short interval of time very near the beginning, we see that the speed of expansion runs through a minimum.

This may be important because these exponential curves show no induction period which is essential to serve their purpose of providing an early time for equilibration of the universe resulting in the eventual thermal homogeneity that we see now. The speed of expansion temporarily drops far below the speed of light, almost to zero, to give a minimum at a very early time. The case wherein the expansion accelerates in the modern era does not display this minimum. So, this is another reason to favor the deceleration scenario if one requires a time in the early history of the universe when equilibration could occur.

I wonder why the equilibration requirement is present in the first place. The Big Bang was not an explosion. It was a sudden expansion of space-time. There was not necessarily any turbulence to act as a source of inhomogeneity that would need to be smoothed out. Indeed, if the universe did in fact originate in a singularity, expansion from a single point should automatically result in a universe that is homogeneous and isotropic, satisfying the cosmological principle. To suppose otherwise requires a mechanism to produce turbulent expansion and none is forthcoming.

So, in order to favor the deceleration scenario, one would need to explain the supernova 1a results that indicate that the universe may be undergoing accelerating expansion in the present epoch. I would say that perhaps these results are a sort of optical illusion stemming from the possibility that when the universe is observed at such early times, it is observed as a more and more purely relativistic object. The tiny residual positive curvature of space-time may become sufficient to produce a kind of distortion of our measurements. Our gross difference in perspective results in what naively looks as if the universe is expanding at an accelerating rate. In other words, acceleration is an artifact.

The apparent development of galaxy clusters being slower in the very early universe than they are in the more recent epoch can be explained in similar fashion in that this is an artifact; this time, of the universe being very young. Youth, per se, must have some consequence, after all.

All plots herein were produced using the mathematical analysis program TK Solver Plus 5.0 by UTS.

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