Mathematics – Logic
Scientific paper
Aug 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997chjph..35..305c&link_type=abstract
Chin. J. Phys., Vol. 35, No. 4, p. 305 - 313
Mathematics
Logic
2
Cosmology: Dark Matter, Cosmology: Friedmann Universe, Cosmology: Inflationary Universe
Scientific paper
The author reviews the current status of cosmological theory. First a brief discussion of the Friedmann model and classical observations is presented. Next the events of the early Universe from a fraction of a second to the present are discussed from the point of view of high temperature thermodynamics. The most important phenomena in this phase are pair creation of particles and nuclear equilibrium at temperatures 109K and above. When the temperature drops, nuclear equilibrium will freeze out, resulting in the synthesis of helium and some light elements. Likewise pairs of particles will annihilate at lower temperatures but some relic particles may remain intact today. So far the theory seems to be on solid ground. However, there are many unanswered questions which force one to make certain drastic assumptions, such as the existence of dark (invisible) matter. One is also forced to retrace the evolution of the Universe back in time to 10-36 second, during which quantum effects of gravity become important. This then leads to the inflationary theory. This theory is still under development.
No associations
LandOfFree
Modern cosmology. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Modern cosmology., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modern cosmology. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1878375