Observational constraints on key-parameters of cosmic reionisation history

Abstract

We discuss constraints on cosmic reionisation and their implications on a cosmic SFR density ${\rho }_{\mathrm{SFR}}$ model; we study the influence of key-parameters such as the clumping factor of ionised hydrogen in the intergalactic medium (IGM) $C_{H_{II}}$ and the fraction of ionising photons escaping star-forming galaxies to reionise the IGM $f_{\mathrm{esc}}$. Our analysis uses SFR history data coming from luminosity functions, assuming that star-forming galaxies were sufficient to lead the reionisation process at high redshift. We add two other sets of constraints: measurements of the IGM ionised fraction and the most recent result from Planck Satellite about the integrated Thomson optical depth of the Cosmic Microwave Background (CMB) ${\tau }_{\mathrm{Planck}}$. We also consider various possibilities for the evolution of these two parameters with redshift, and confront them with observational data cited above. We conclude that, if the model of a constant clumping factor is chosen, the fiducial value of $3$ often used in papers is consistent with observations; even if a redshift-dependent model is considered, the resulting optical depth is strongly correlated to $C_{H_{II}}$ mean value at $z>7$, an additional argument in favour of the use of a constant clumping factor. Besides, the escape fraction is related to too many astrophysical parameters to allow us to use a complete and fully satisfactory model. A constant value with redshift seems again to be the most likely expression: considering it as a fit parameter, we get from the maximum likelihood (ML) model $f_{\mathrm{esc}}=0.24\pm 0.08$; with a redshift-dependent model, we find an almost constant evolution, slightly increasing with $z$, around $f_{\mathrm{esc}}=0.23$. Last, our analysis shows that a reionisation beginning as early as $z\ge 14$ and persisting until $z\sim 6$ is a likely storyline.

arXiv comment11 pages, 10 figures, accepted for publication in A&A

References in corpus (74)

• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• Planck 2015 results. XIII. Cosmological parameters
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• Planck 2013 results. XVI. Cosmological parameters
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Cosmic Star Formation History
• A luminous quasar at a redshift of z = 7.085
• Constraining the Evolution of the Ionizing Background and the Epoch of Reionization with z ~ 6 Quasars II: A Sample of 19 Quasars
• The Star Formation History of Field Galaxies
• UV Luminosity Functions at redshifts z~4 to z~10: 10000 Galaxies from HST Legacy Fields
• Radiative transfer in a clumpy universe: IV. New synthesis models of the cosmic UV/X-ray background
• Starburst-driven Mass Loss from Dwarf Galaxies: Efficiency and Metal Ejection
• Cosmic Reionization and Early Star-Forming Galaxies: A Joint Analysis of New Constraints from Planck and Hubble Space Telescope
• The Evolution of the Galaxy Rest-Frame Ultraviolet Luminosity Function Over the First Two Billion Years
• Statistics of 207 Lya Emitters at a Redshift Near 7: Constraints on Reionization and Galaxy Formation Models
• UV Luminosity Functions at z~4, 5, and 6 from the HUDF and other Deep HST ACS Fields: Evolution and Star Formation History
• New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign
• Model-independent evidence in favor of an end to reionization by z~6
• Reionization after Planck: The Derived Growth of the Cosmic Ionizing Emissivity now matches the Growth of the Galaxy UV Luminosity Density
• Evidence of patchy hydrogen reionization from an extreme Ly$\alpha$ trough below redshift six
• How exactly did the Universe become neutral?
• Lyman Continuum Emission from Galaxies at z~3.4
• A new multi-field determination of the galaxy luminosity function at z=7-9 incorporating the 2012 Hubble Ultra Deep Field imaging
• The Birth of a Galaxy - III. Propelling reionisation with the faintest galaxies
• Directly Observing the Galaxies Likely Responsible for Reionization
• Simulating Cosmic Reionization at Large Scales I: the Geometry of Reionization
• The Universe is Reionizing at z~7: Bayesian Inference of the IGM Neutral Fraction Using Ly$\alpha$ Emission from Galaxies
• Cosmic Reionization after Planck: Could Quasars Do It All?
• The observed ionization rate of the intergalactic medium and the ionizing emissivity at z >5: Evidence for a photon starved and extended epoch of reionization
• Detection of Extended He II Reionization in the Temperature Evolution of the Intergalactic Medium
• Concordance models of reionization: implications for faint galaxies and escape fraction evolution
• Photoionization Feedback in Low--Mass Galaxies at High Redshift
• Lower-Luminosity Galaxies could reionize the Universe: Very Steep Faint-End Slopes to the UV Luminosity Functions at z>=5-8 from the HUDF09 WFC3/IR Observations
• The UV Luminosity Function of star-forming galaxies via dropout selection at redshifts z ~ 7 and 8 from the 2012 Ultra Deep Field campaign
• Keeping the Universe ionised: Photo-heating and the clumping factor of the high-redshift intergalactic medium
• Evolution of the Intergalactic Opacity: Implications for the Ionizing Background, Cosmic Star Formation, and Quasar Activity
• Planck intermediate results. XLVII. Planck constraints on reionization history
• Taxing the Rich: Recombinations and Bubble Growth During Reionization
• The Evolution of Lyman Limit Absorption Systems to Redshift Six
• The First Billion Years Project: The escape fraction of ionizing photons in the epoch of reionization
• The Thermal Memory of Reionization History
• How neutral is the intergalactic medium surrounding the redshift z=7.085 quasar ULAS J1120+0641?
• Simulating Cosmic Reionization at Large Scales II: the 21-cm Emission Features and Statistical Signals
• A Census of Star-Forming Galaxies in the z~9-10 Universe based on HST+Spitzer Observations Over 19 CLASH clusters: Three Candidate z~9-10 Galaxies and Improved Constraints on the Star Formation Rate Density at z~9
• Detections of Lyman Continuum from Star-forming Galaxies at z~3 Through Subaru/Suprime-Cam Narrow-band Imaging
• The UV continua and inferred stellar populations of galaxies at z ~ 7 - 9 revealed by the Hubble Ultra Deep Field 2012 campaign
• Rapid Decline of Lyman-alpha Emission Toward the Reionization Era
• Inhomogeneous recombinations during cosmic reionization
• Self-regulated reionization
• Hubble Frontier Fields First Complete Cluster Data: Faint Galaxies at $z\sim 5-10$ for UV Luminosity Functions and Cosmic Reionization
• New redshift z ~ 9 galaxies in the Hubble Frontier Fields: Implications for early evolution of the UV luminosity density
• New Constraints on the Faint-end of the UV Luminosity Function at z~7-8 using the Gravitational Lensing of the Hubble Frontier Fields Cluster A2744
• Cosmic Reionisation by Stellar Sources: Population II Stars
• The Reionization and Galaxy Evolution Probed by z=7 Lyman Alpha Emitters
• Spectroscopy of z ~ 7 candidate galaxies: Using Lyman-alpha to constrain the neutral fraction of hydrogen in the high-redshift universe
• A Measurement of Small Scale Structure in the 2.2 < z < 4.2 Lyman-alpha Forest
• A Direct Measurement of the IGM Opacity to HI Ionizing Photons
• Cosmic reionization after Planck
• First Frontier Field Constraints on the Cosmic Star-Formation Rate Density at z~10 - The Impact of Lensing Shear on Completeness of High-Redshift Galaxy Samples
• Evidence of Gunn-Peterson damping wings in high-z quasar spectra: strengthening the case for incomplete reionization
• Gas Clumping in Self-Consistent Reionisation Models
• Accurately predicting the escape fraction of ionizing photons using restframe ultraviolet absorption lines
• Improved measurements of the intergalactic medium temperature around quasars: possible evidence for the initial stages of He-II reionisation at z~6
• The redshift evolution of escape fraction of hydrogen ionizing photons from galaxies
• The Global History of Reionisation
• Escape fraction of ionizing photons from galaxies at z=0--6
• The contribution of faint AGNs to the ionizing background at z~4
• Escape of Lyman-alpha and continuum photons from star-forming galaxies
• Spectroscopic observation of Ly$\alpha$ emitters at z~7.7 and implications on re-ionization
• A new parameterization of the reionisation history
• Modelling recombinations during cosmological reionization
• Constraining the Contribution of Galaxies and Active Galactic Nuclei to Cosmic Reionization
• A Novel Approach to Constrain the Escape Fraction and Dust Content at High Redshift Using the Cosmic Infrared Background Fractional Anisotropy

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• Retrieving cosmological information from small-scale CMB foregrounds II. The kinetic Sunyaev Zel'dovich effect
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• Improved constraints on reionisation from CMB observations: A parameterisation of the kSZ effect
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• A galaxy-free phenomenological model for the 21-cm power spectrum during reionization
• Gaussian Process Reconstruction of Reionization History
• SCORCH. III. Analytical Models of Reionization with Varying Clumping Factors
• Joint constraints on reionization: a framework for combining the global 21cm signal and the kinetic Sunyaev-Zel'dovich effect
• Dark Twilight Joined with the Light of Dawn to Unveil the Reionization History
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• What can we learn about Reionization astrophysical parameters using Gaussian Process Regression?
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