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Evidence for a static universe



 
 
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Old December 13th 16, 06:37 PM posted to sci.astro.research
Phillip Helbig
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Default Evidence for a static universe

In article , "Phillip Helbig (undress to
reply)" writes:

Inflation NEVER predicted a matter density equal to the critical
density. It predicts, fairly robustly, a flat universe. If one ASSUMES
that the cosmological constant is zero, then that implies Omega=1, but
this is an invalid assumption and is not a prediction of inflation.

But with the observations of distant supernovae in 1997, we discovered
that we were missing the energy density required for cosmic
acceleration, and that this energy density is roughly what was needed
for a flat universe. Subsequent CMB observations have confirmed this
estimate of the amount of dark energy.


This is simply not true. Look at the contours in the lambda-Omega plane
from the supernova data. They are essentially orthogonal to lines of
constant curvature. Yes, they do indicate a positive cosmological
constant, and while compatible with a flat universe, are also compatible
with a much larger region of parameter space.

Thus the distant supernovae observations validate the major prediction
of inflation models.


The major prediction is flatness, and the CMB data say essentially
nothing about this. There is no conflict; they are just not very
sensitive to the curvature.


This should be "and the supernova data say essentially nothing about
this".

The CMB contours are essentially perpendicular to the supernova contours
in the lambda-Omega plane, the former being almost parallel to lines of
constant curvature, which is why combining them gives much tighter
constraints.

The prediction of inflation models of a flat universe has been
confirmed in multiple ways.


Yes, but not by supernova data.


 




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