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Non-standard mechanism of recombination in the early Universe.
- Source :
-
Monthly Notices of the Royal Astronomical Society . 1/15/2022, Vol. 509 Issue 2, p1755-1763. 9p. - Publication Year :
- 2022
-
Abstract
- In our recent papers, a non-standard quasi-molecular mechanism was suggested and applied to treat the cosmological recombination. It was assumed that, in the pre-recombination stage of evolution of the Universe, an electron combined with two neighbouring protons and created a hydrogen molecular ion, |$\mathrm{ H}_2^+$| in a highly excited state, which then descended into the lower lying state or dissociated. In this work, we implement a quantitative analysis of this quasi-molecular mechanism of recombination; namely, we elaborate the scheme of calculation for a free–bound radiative transition. We show that the quasi-molecular mechanism played a significant role in the pre-recombination and recombination stages of evolution of the early Universe, and hence must be included into the consideration of the description of a thermal history of the Universe. Together with the earlier developed treatment of bound–bound radiative transitions in |$\mathrm{ H}_2^+$| , the elaborated scheme of calculation can be used for the design of a rapid and complete cosmological recombination code. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RADIATIVE transitions
*PHYSICAL cosmology
*IONS
*EXCITED states
*HYDROGEN ions
Subjects
Details
- Language :
- English
- ISSN :
- 00358711
- Volume :
- 509
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Publication Type :
- Academic Journal
- Accession number :
- 154830263
- Full Text :
- https://doi.org/10.1093/mnras/stab3102