CMB anisotropies and matter structures

In summary: These forces caused the Universe to expand superluminally (faster than the speed of light) for a very short period of time.In summary, the CMB hot and cold spots represent seeds of galactic structure and can reveal information about the forces involved in the Inflationary stage of the Big Bang. However, they cannot accurately indicate the current positions of great mass structures due to the vast amount of time that has passed since their formation.
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hellfire
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CMB anisotropies are deviations of the temperature of the black body emission mainly (but not only) by photons, which have to climb out gravitational potential of higher density concentrations during recombination epoch and during their spatio-temporal trajectory till now (Sachs-Wolfe effect). Since these 'cold spots' in the CMB are located on the sky at very specific locations, my question is whether they can be used to infere bout the position of great mass structures now (clusters, dark matter), and, if not, why not.

Thanks.
 
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Seeds Of Galactic Structure (CMB Hot & Cold Spots)

“Since these 'cold spots' in the CMB are located on the sky at very specific locations, my question is whether they can be used to infere bout the position of great mass structures now (clusters, dark matter), and, if not, why not.”

The clumps (BOTH hot and cold spots) are imprints on the CMB which are evidence for the emergence of structure within the Universe. These imprints show up on a finer scale than the primordial features etched onto the CMB by the Big Bang itself. The hot and cold spots in the CMB represent seeds from which galaxies and galaxy clusters were born. As photons penetrated galactic clusters, hot and cold spots were generated that differ by only a millionth of a degree from the average temp of the CMB (2.76 Kelvins or about a 1/10th of the temperature of the Universe – as it was in the act of birth).
Now, unless you can rewind time back to its nascent stage, I can’t really see how any accurate picture of how great mass structures came to be in the positions they are now, could possibly be drawn. We’re talking about some +/- 16 billion years. However, the CMB hot and cold spots can reveal secrets about the forces involved in the Inflationary stage of the Big Bang.
 

What are CMB anisotropies?

CMB anisotropies refer to the small variations in temperature and density of the Cosmic Microwave Background (CMB) radiation. These variations provide crucial information about the early universe and the formation of structures in the universe.

How are CMB anisotropies measured?

CMB anisotropies are measured through satellites and ground-based telescopes that can detect the very faint microwave radiation from the CMB. The variations in temperature and density are then mapped out to create a detailed picture of the CMB anisotropies.

What do CMB anisotropies tell us about the early universe?

CMB anisotropies provide evidence for the Big Bang theory and the rapid expansion of the universe. They also reveal the distribution of matter and energy in the early universe, including the presence of dark matter and dark energy. Additionally, CMB anisotropies can help us understand the properties of the universe, such as its age, geometry, and composition.

What are matter structures in relation to CMB anisotropies?

Matter structures refer to the large-scale distribution of matter in the universe, including galaxies, clusters, and filaments. These structures are imprinted in the CMB anisotropies and can help us understand the growth of structures in the universe over time.

How do CMB anisotropies and matter structures relate to each other?

CMB anisotropies and matter structures are closely related as the matter structures were formed from the small variations in density seen in the CMB. By studying the patterns and distribution of matter structures, we can gain a better understanding of the CMB anisotropies and the early universe.

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