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wolram
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How does dark matter suppress baryonic osculations?
I don't think it suppresses them. It just doesn't participate in them (as dark matter doesn't experience pressure to any significant degree). In practical terms this means that dark matter contributes to all of the odd peaks in the CMB power spectrum, while only the normal matter contributes to the even peaks.wolram said:How does dark matter suppress baryonic osculations?
But it does, doesn't it? - it suppresses the even peaks as it acts gravitationally against the bouncing baryonic matter so that it doesn't expand as much as a result.Chalnoth said:I don't think it suppresses them. It just doesn't participate in them (as dark matter doesn't experience pressure to any significant degree). In practical terms this means that dark matter contributes to all of the odd peaks in the CMB power spectrum, while only the normal matter contributes to the even peaks.
Dark matter is a type of matter that does not emit or interact with light, making it invisible to telescopes and other instruments. It is believed to make up about 27% of the total matter in the universe. Baryonic oscillations, on the other hand, refer to the regular fluctuations in the density of visible matter in the universe. While dark matter and baryonic oscillations are two distinct concepts, they are related because the presence of dark matter affects the behavior of baryonic matter.
Dark matter suppresses baryonic oscillations by exerting gravitational forces on visible matter. It acts as a sort of scaffolding for the distribution of visible matter, preventing it from collapsing and forming structures too quickly. This allows baryonic oscillations to develop and expand in a more regular and predictable manner.
Baryonic oscillations are significant because they provide a standard ruler for measuring distances in the universe. This allows scientists to map out the large-scale structure of the universe and study its expansion over time. Baryonic oscillations also provide important clues about the distribution and growth of dark matter in the universe.
Scientists study the effects of dark matter on baryonic oscillations through observations of the cosmic microwave background (CMB) radiation. This is the leftover radiation from the early universe and contains imprints of the distribution of matter at that time. By analyzing the patterns and fluctuations in the CMB, scientists can infer the presence and properties of dark matter and its impact on baryonic oscillations.
The understanding of how dark matter suppresses baryonic oscillations has implications for our understanding of the evolution and structure of the universe. It also has practical applications, such as helping scientists to refine their models for predicting the growth and distribution of large-scale structures in the universe. Ultimately, this knowledge could also inform future studies and experiments aimed at detecting and studying dark matter directly.