Cosmological recombination

Cosmological recombination is the epoch in which cooling allowed free electrons and ions to form neutral atoms, sharply reducing the free-electron density.

Table of contents 121 6
- Saha ionization equation Cosmological recombination 61 2
  - Chemical-potential balance for ionization Saha ionization equation 27
  - Hydrogen binding energy Saha ionization equation 13
- Free-electron fraction during hydrogen--helium recombination Cosmological recombination 38 2
  - Coupled hydrogen--helium Saha equations Free-electron fraction during hydrogen--helium recombination 23 1
    - Hydrogen-only Saha equation Coupled hydrogen--helium Saha equations 11

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