Relative contribution of the hydrogen 2S two-photon decay and Lyman-alpha escape channels during the epoch of cosmological recombination
arXiv:1711.05533 · doi:10.1134/S1063773718010036
Abstract
We discuss the evolution of the ratio in number of recombinations due to 2s two photon escape and due to the escape of Lyman- photons from the resonance during the epoch of cosmological recombination, within the width of the last scattering surface and near its boundaries. We discuss how this ratio evolves in time, and how it defines the profile of the Lyman- line in the spectrum of CMB. One of the key reasons for explaining its time dependence is the strong overpopulation of the 2p level relative to the 2s level at redshifts $z \la 750$.
Accepted for publication in Astronomy Letters
References in corpus (6)
- Lines in the Cosmic Microwave Background Spectrum from the Epoch of Cosmological Hydrogen Recombination
- Free-bound emission from cosmological hydrogen recombination
- CosmoSpec: Fast and detailed computation of the cosmological recombination radiation from hydrogen and helium
- Time-Dependent Corrections to the Ly-alpha Escape Probability During Cosmological Hydrogen Recombination
- Radiative transfer effects in primordial hydrogen recombination
- How accurately can we measure the hydrogen 2S->1S transition rate from the cosmological data?