On Saturday, 28 October 2017 06:24:42 UTC+2, Phillip Helbig wrote:
In article ,
Nicolaas Vroom writes:

This raises the question how important is nonbaryonic matter
for the evolution of the Universe?

Very. Without dark matter, the fluctuations observed in the CMB would
not have had time to form the structure we see today.

As far as I understand the fluctuations in the CMB we see to day are
caused by matter fluctuations of the Universe 300000 years after the BB.
To be more specific in the outer layer of the Universe.
(It is not the CMB that caused these fluctuations)
During that period apperently there was already a division between
baryonic versus non-baryonic matter which we can observe in the second and
third peak CMB power spectrum. See:
https://en.wikipedia.org/wiki/Cosmic...ary_anisotropy

The question is how exactly do we know that these peaks are caused
by baryonic and non baryonic matter, of which the last physical is an almost
bare landscape. For more detail see ref 52 and 53 (Wayne Hu).
Specific what is IMO the most tricky is the relation between the two.

Nicolaas Vroom