Bibcode
Salvador-Solé, E.; Manrique, Alberto; Guzman, Rafael; Rodríguez Espinosa, J. M.; Gallego, Jesús; Herrero, A.; Mas-Hesse, J. Miguel; Marín Franch, Antonio
Bibliographical reference
The Astrophysical Journal, Volume 834, Issue 1, article id. 49, 23 pp. (2017).
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1
2017
Journal
Citations
15
Refereed citations
13
Description
We combine observational data on a dozen independent cosmic properties
at high-z with the information on reionization drawn from the spectra of
distant luminous sources and the cosmic microwave background (CMB) to
constrain the interconnected evolution of galaxies and the intergalactic
medium since the dark ages. The only acceptable solutions are
concentrated in two narrow sets. In one of them reionization proceeds in
two phases: a first one driven by Population III stars, completed at
z∼ 10, and after a short recombination period a second one driven by
normal galaxies, completed at z∼ 6. In the other set both kinds of
sources work in parallel until full reionization at z∼ 6. The best
solution with double reionization gives excellent fits to all the
observed cosmic histories, but the CMB optical depth is 3σ larger
than the recent estimate from the Planck data. Alternatively, the best
solution with single reionization gives less good fits to the observed
star formation rate density and cold gas mass density histories, but the
CMB optical depth is consistent with that estimate. We make several
predictions, testable with future observations, that should discriminate
between the two reionization scenarios. As a byproduct our models
provide a natural explanation to some characteristic features of the
cosmic properties at high-z, as well as to the origin of globular
clusters.
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