Saha ionization equation in early universe
| Autor: | S. Mallik, Aritra Das, Ritesh Ghosh |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
media_common.quotation_subject FOS: Physical sciences Astronomy and Astrophysics Saha ionization equation Boltzmann equation Universe High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Space and Planetary Science Quantum electrodynamics Ionization Physics::Atomic Physics Ground state Recombination media_common |
| DOI: | 10.48550/arxiv.1812.10686 |
| Popis: | The Saha equation follows from thermal equilibrium of matter and radiation. We discuss this problem of equilibrium in the early universe, when matter consists mostly of electrons, protons and hydrogen atoms. Taking H-atoms in their ground state only and applying the real time formulation of thermal field theory, we calculate the difference of ionization and recombination rates, which controls the equilibration of H-atoms. This rate is compared with the expansion rate of the universe at different temperatures. Comment: 9 pages, 3 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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