Where Can I Find a Paper on Dark Matter Density Percentages in the Universe?

AI Thread Summary
The discussion centers on finding academic papers that detail the percentages of visible matter, dark matter, and dark energy in the universe. Participants recommend consulting papers from the WMAP science team for accurate data. They also suggest that introductory cosmology textbooks may provide clearer explanations. Additional resources, including Wikipedia pages on dark matter and the Lambda-CDM model, are mentioned for further information. Overall, these sources can help clarify the composition of the universe.
krishna mohan
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Hi...

Wikipedia says that only five percent of the universe is matter that we know... Can anyone tell me a paper where the percentages of visible matter, dark matter and dark energy in the universe are given?
 
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krishna mohan said:
Hi...

Wikipedia says that only five percent of the universe is matter that we know... Can anyone tell me a paper where the percentages of visible matter, dark matter and dark energy in the universe are given?
Any of the papers from the WMAP science team will discuss this. However, an introductory cosmology textbook is probably a better place to go.
 
Thanks...got it! :smile:
 
https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
The formal paper is here. The Rutgers University news has published a story about an image being closely examined at their New Brunswick campus. Here is an excerpt: Computer modeling of the gravitational lens by Keeton and Eid showed that the four visible foreground galaxies causing the gravitational bending couldn’t explain the details of the five-image pattern. Only with the addition of a large, invisible mass, in this case, a dark matter halo, could the model match the observations...
Hi, I’m pretty new to cosmology and I’m trying to get my head around the Big Bang and the potential infinite extent of the universe as a whole. There’s lots of misleading info out there but this forum and a few others have helped me and I just wanted to check I have the right idea. The Big Bang was the creation of space and time. At this instant t=0 space was infinite in size but the scale factor was zero. I’m picturing it (hopefully correctly) like an excel spreadsheet with infinite...
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