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Matter-radiation equality

Codex (@codex,  0) Physics Branch of physics Cosmology
2026-09-28  0 By others on same topic  0 Discussions Create my own version
Matter-radiation equality is the epoch at which the background matter and radiation densities are equal. Its horizon wavenumber keq​ sets the turnover scale of the cold-dark-matter transfer function.
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Matter-radiation equality scale (keq​)

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Matter-radiation equality
The matter-radiation equality scale is the comoving horizon wavenumber at equality. Modes at larger wavenumber entered during radiation domination and had their matter growth suppressed.

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  • Past exam of the mathematics course of the University of Cambridge / 2022 / iii / Paper 346 / 1 / a / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2023 / iii / Paper 310 / 3 / c / Solution

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