Relative Contribution of the Hydrogen 2 s Two-Photon Decay and Lyman- α Escape Channels during the Epoch of Cosmological Recombination

Bibcode
2018AstL...44....1R
DOI
10.1134/S1063773718010036
Rubiño-Martin, J. A.; Sunyaev, R. A.
Bibliographical reference

Astronomy Letters, Volume 44, Issue 1, pp.1-7

Advertised on:
1
2018
Journal
Astronomy Letters
Number of authors
2
IAC number of authors
1
Citations
1
Refereed citations
1
Description
We discuss the evolution of the ratio in number of recombinations due to 2 s two photon escape and due to the escape of Lyman- α 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- α line in the spectrum of CMB. One of the key reasons for explaining its time dependence is the strong overpopulation of the 2 p level relative to the 2 s level at redshifts z ≲ 750.
Related projects
Full-sky map showing the spatial distribution of the primary anisotropies of the Cosmic Microwave Background (generated 380,000 years after the Big Bang) derived from observations of the Planck satellite
Anisotropy of the Cosmic Microwave Background
The general goal of this project is to determine and characterize the spatial and spectral variations in the temperature and polarisation of the Cosmic Microwave Background in angular scales from several arcminutes to several degrees. The primordial matter density fluctuations which originated the structure in the matter distribution of the present
Rafael
Rebolo López
In progress
Type
Refereed
Cosmology & Astroparticles (CYA, CTA)

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