J/ApJ/834/49 Constraining the epoch of reionization (Salvador-Sole+, 2017)
Constraining the epoch of reionization from the observed properties of the
high-z universe.
Salvador-Sole E., Manrique A., Guzman R., Rodriguez Espinosa J.M.,
Gallego J., Herrero A., Mas-Hesse J.M., Franch A.M.
<Astrophys. J. 834, 49 (2017)>
=2017ApJ...834...49S 2017ApJ...834...49S (SIMBAD/NED BibCode)
ADC_Keywords: Models, evolutionary ; Galaxies ; Active gal. nuclei ;
H II regions
Keywords: cosmology: dark ages, reionization, first stars - evolution -
galaxies: formation - quasars: supermassive black holes -
stars: Population III
Abstract:
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.
Description:
We tabulate some IGM quantities as a function of redshift for the
double and single reionization scenarios provided by the analytical
model AMIGA in the cosmology assumed in the paper, as showed in
Fig. 7.
The IGM quantities are: 1) volume filling factor of singly ionized
regions; 2) volume filling factor of doubly ionized regions; 3) IGM
clumping factor; 4) total (PopI/II + PopIII + AGN) single ionizing
emissivity; 5) PopI/II single ionizing emissivity; 6) PopIII single
ionizing emissivity; 7) AGN single ionizing emissivity; 8) total
(PopI/II + PopIII + AGN) double ionizing emissivity; 9) IGM
metallicity; 10) IGM temperature of neutral regions; 11) IGM
temperature of singly ionized regions; 12) IGM temperature of doubly
ionized regions.
Tabulated IGM quantities as a function of redshift for the double and
single reionization scenarios. PopI/II refers to normal galaxies and
PopIII to primeval (null metallicity) galaxies. Ionizing emissivities
are given in units of 1051 photons/s/cMpc3 (comoving),
metallicities in units of 10-4Z☉ and temperatures in units of
104K. Filling and clumping factors are dimensionless.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
igm_d.dat 147 55 Double reionization scenario
igm_s.dat 147 54 Single reionization scenario
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Byte-by-byte Description of file: igm_d.dat igm_s.dat
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Bytes Format Units Label Explanations
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2- 6 F5.2 --- z Redshift
9- 20 E12.4 --- QSII Volume filling factor of
singly ionized regions
21- 32 E12.4 --- QSIII Volume filling factor of
doubly ionized regions
34- 38 F5.3 --- C IGM clumping factor
45- 56 E12.4 10+51ph/s/Mpc3 dNII-T Total (PopI/II + PopIII + AGN)
single ionizing emissivity (1)
57- 68 E12.4 10+51ph/s/Mpc3 dNII-I/II PopI/II single ionizing emissivity (1)
69- 80 E12.4 10+51ph/s/Mpc3 dNII-III PopIII single ionizing emissivity (1)
81- 92 E12.4 10+51ph/s/Mpc3 dNII-AGN AGN single ionizing emissivity (1)
93-102 E10.4 10+51ph/s/Mpc3 dNIII Total (PopI/II + PopIII + AGN)
double ionizing emissivity (1)
105-116 E12.4 10-4Sun ZIGM IGM metallicity (in 10-4Z☉)
117-128 E12.4 10+4K TIGMI IGM temperature of neutral regions
129-135 F7.4 10+4K TIGMII IGM temperature of
singly ionized regions
141-147 F7.4 10+4K TIGMIII IGM temperature of
doubly ionized regions
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Note (1): in 10+51ph/s/cMpc3 (comoving) units.
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Acknowledgements:
Alberto Manrique, a.manrique(at)ub.edu
(End) Patricia Vannier [CDS] 09-Feb-2022