Cosmology View

My views on Cosmology and Physics

`Posts`

Fixing Foolish Cosmology

The mistake which resulted in the big bang and dark energy is actually very simple.

That it was never fixed in the course of 100 years, I feel justified to call cosmology foolish.

The mistake is just the selection of units!!!

I wrote a book to explain the many mistakes in cosmology, and how to fix them.

Perhaps this post removes the incentive to read the book.

A red shift is a measured change in a wavelength. This change is essentially a ratio between observed and original. It is described with a dimensionless value called z. z is actually the ratio of the object's velocity compared to the velocity of light, c.

If you multiply z times c, the result in km/s.

In the 1920's, astronomers were measuring red shifts of galaxies. Soon a pattern was observed. The red shift increased as the distance increased. Cepheids were extensively measured in the 1920's.
.
When one is found, the Cepheid enabled the distance to be calculated for its galaxy.

The initial Hubble's law would have used this ratio, z / Mpc, for its Hubble's Constant.

Vesto Slipher is given the credit, or blame, for treating that z as a velocity.

This mistake changed the ratio to this: km/s / Mpc.

My book spends a few pages justifying this z value for a galaxy comes from the hydrogen atoms in the IGM.

This ratio could be called the "Inter-Galactic Medium factor" or IMF, or whatever (the book has another), but its units must be z / Mpc

The updated Hubble's Law distance equation becomes:

D = z / IMF, where D is in Mpc. and z is the galaxy's red shift.

When every galaxy gets a z value then none gets a velocity. Each should get an IMF.

For those galaxies with no Cepheid they could be assigned their IMF from a nearby galaxy which has a Cepheid.

There is no justification to expect this IMF is uniform across the entire universe. That is the expectation for Hubble's Constant. Even its name says it is a constant. Unfortunately, cosmology is in crisis mode when its value changes however it is measured.
That also results in the uniform expansion of the universe.

IMF cannot be treated as a constant.

In my personal opinion, this is embarrassing for cosmology.

If someone in the last century had just returned  this ratio to using z not a velocity, then there would be no big bang and no dark energy.

I call this foolish.
date posted 06/27/2020