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why doesn't the apparent d^2a/dt^2>0 have an impact on the CMB.... it
is believed that an accelerated object experiences radiation, similar in
nature to Hawking radiation. This is known as the Unruh effect.
I don't think "accelerating" is the right word.
If a velocity changes, we say there is an acceleration.
But since the Hubble parameter has units of 1/time, not
distance/time, a change therein shouldn't be called an
acceleration. Maybe we should call it an "exacerbation"
or something....
Now my question remains. Assuming that in
fact d^2a/dt^2>0, then similar boundaries must be created in our universe.
Now I suspect
there is a flaw is this chain of reasoning but I can't see
what it is. .... My post to the list
which laid this thought process out in detail was ignored.