Is it certain that CMBR originates from the 5% of ordinary matter?

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SUMMARY

The discussion centers on the origins of Cosmic Microwave Background Radiation (CMBR) and its relationship to the 5% of ordinary matter in the universe, as defined by the standard model of cosmology. Participants argue that while CMBR is believed to stem from the Big Bang, the vast unknowns represented by dark matter and dark energy (95% of the universe) raise questions about the certainty of this assertion. Key points include the role of recombination in the formation of neutral hydrogen and helium, which allowed photons to travel freely, thus contributing to CMBR. The conversation highlights the need for continued exploration of dark matter and dark energy, as well as the implications of potential new theories.

PREREQUISITES
  • Understanding of the standard model of cosmology
  • Knowledge of the Big Bang theory and its implications
  • Familiarity with concepts of dark matter and dark energy
  • Basic principles of quantum field theory (QFT) and general relativity (GR)
NEXT STEPS
  • Research the role of recombination in the early universe and its impact on CMBR
  • Explore the characteristics and theories surrounding dark matter, including WIMPs
  • Investigate models of dark energy, specifically the cosmological constant and quintessence
  • Examine current observational efforts related to CMBR and potential anomalies
USEFUL FOR

Astronomers, cosmologists, physics students, and anyone interested in the fundamental questions of the universe's composition and the implications of dark matter and dark energy.

  • #31
Is this cold spot any cause for concern for the standard model?
It does seem to suggest at least that the Universe is not quite as isotropic and homogeneous as first thought. Do CMBR hot spots and cold spots correlate at all with galaxy super clusters and super voids and if so what is the cause of the correlation?

http://en.wikipedia.org/wiki/CMB_cold_spot

http://news.yahoo.com/scientists-discuss-universes-strange-dense-spot-wednesday-watch-151311146.html

http://en.wikipedia.org/wiki/Large-scale_structure_of_the_universe#Large-scale_structure

http://en.wikipedia.org/wiki/Huge-LQG
 
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  • #32
The probability of finding a deviation at least as high in Gaussian simulations was found to be 1.85%.
Interesting, but not a serious issue if that number does not change.

Do CMBR hot spots and cold spots correlate at all with galaxy super clusters and super voids and if so what is the cause of the correlation?
Integrated Sachs-Wolfe effect, as mentioned in the article. The original hot/cold regions come from matter so far away that we don't see the galaxies that formed out of this - their light did not reach us yet, and probably won't if the expansion of the universe keeps accelerating.
 

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