Lyman-alpha emitters gone missing: the different evolution of the bright and faint populations

Abstract

We model the transmission of the Lyman-alpha line through the circum- and intergalactic media around dark matter haloes expected to host Lyman-alpha emitters (LAEs) at z > 5.7, using the high-dynamic-range Sherwood simulations. We find very different CGM environments around more massive haloes (~10^11 M_sun) compared to less massive haloes (~10^9 M_sun) at these redshifts, which can contribute to a different evolution of the Lyman-alpha transmission from LAEs within these haloes. Additionally we confirm that part of the differential evolution could result from bright LAEs being more likely to reside in larger ionized regions. We conclude that a combination of the CGM environment and the IGM ionization structure is likely to be responsible for the differential evolution of the bright and faint ends of the LAE luminosity function at z > 6. More generally, we confirm the suggestion that the self-shielded neutral gas in the outskirts of the host halo can strongly attenuate the Lyman-alpha emission from high redshift galaxies. We find that this has a stronger effect on the more massive haloes hosting brighter LAEs. The faint-end of the LAE luminosity function is thus a more reliable probe of the average ionization state of the IGM. Comparing our model for LAEs with a range of observational data we find that the favoured reionization histories are our previously advocated `Late' and `Very Late' reionization histories, in which reionization finishes rather rapidly at around z ~ 6.

arXiv comment26 pages, 16 figures, 2 appendices; accepted for publication by MNRAS

References in corpus (98)

• The NumPy array: a structure for efficient numerical computation
• Planck 2013 results. XVI. Cosmological parameters
• The cosmological simulation code GADGET-2
• GADGET: A code for collisionless and gasdynamical cosmological simulations
• Constraining the Evolution of the Ionizing Background and the Epoch of Reionization with z ~ 6 Quasars II: A Sample of 19 Quasars
• Rest-Frame Ultraviolet Spectra of z~3 Lyman Break 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
• The Structure and Kinematics of the Circum-Galactic Medium from Far-UV Spectra of z~2-3 Galaxies
• The SDSS Quasar Survey: Quasar Luminosity Function from Data Release Three
• 21cmFAST: A Fast, Semi-Numerical Simulation of the High-Redshift 21-cm Signal
• The Evolution of the Galaxy Rest-Frame Ultraviolet Luminosity Function Over the First Two Billion Years
• A New Calculation of the Ionizing Background Spectrum and the Effects of HeII Reionization
• Statistics of 207 Lya Emitters at a Redshift Near 7: Constraints on Reionization and Galaxy Formation Models
• The Growth of HII Regions During Reionization
• The 2dF Galaxy Redshift Survey: The bias of galaxies and the density of the Universe
• The Subaru/XMM-Newton Deep Survey (SXDS). IV. Evolution of Lya Emitters from z=3.1 to 5.7 in the 1 deg^2 Field: Luminosity Functions and AGN
• 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
• On the evolution of the HI column density distribution in cosmological simulations
• Efficient Simulations of Early Structure Formation and Reionization
• Keck Spectroscopy of Faint 3<z<7 Lyman Break Galaxies: - I. New constraints on cosmic reionisation from the luminosity and redshift-dependent fraction of Lyman-alpha emission
• Evidence of patchy hydrogen reionization from an extreme Ly$\alpha$ trough below redshift six
• The End of the Reionization Epoch Probed by Ly-alpha Emitters at z=6.5 in the Subaru Deep Field
• Spectroscopic Confirmation of Three z-Dropout Galaxies at z = 6.844 - 7.213: Demographics of Lyman-Alpha Emission in z ~ 7 Galaxies
• Lyman-alpha and CIII] Emission in z=7-9 Galaxies: Accelerated Reionization Around Luminous Star Forming Systems?
• The Physics of the Intergalactic Medium
• Detection of Extended He II Reionization in the Temperature Evolution of the Intergalactic Medium
• Model-independent insights into the nature of the Lyman-alpha forest and the distribution of matter in the universe
• Simulations and Analytic Calculations of Bubble Growth During Hydrogen Reionization
• New Measurements of the Ionizing Ultraviolet Background over 2 < z < 5 and Implications for Hydrogen Reionization
• Lyman Alpha Radiation From Collapsing Protogalaxies I: Characteristics of the Emergent Spectrum
• Physical Conditions in a Young, Unreddened, Low Metallicity Galaxy at High Redshift
• Concordance models of reionization: implications for faint galaxies and escape fraction evolution
• The Density of Lyman-alpha Emitters at Very High Redshift
• Inferring the dark matter power spectrum from the Lyman-alpha forest in high-resolution QSO absorption spectra
• Lyman Alpha Emitting Galaxies as a Probe of Reionization
• Keck Spectroscopy of Faint 3<z<8 Lyman Break Galaxies:- Evidence for a Declining Fraction of Emission Line Sources In the Redshift Range 6<z<8
• The Galaxy UV Luminosity Function Before the Epoch of Reionization
• New observations of z~7 galaxies: evidence for a patchy reionization
• Keck Spectroscopy of Faint 3<z<7 Lyman Break Galaxies:- II. A High Fraction of Line Emitters at Redshift Six
• Lyman-alpha Emission from a Luminous z=8.68 Galaxy: Implications for Galaxies as Tracers of Cosmic Reionization
• Planck intermediate results. XLVII. Planck constraints on reionization history
• Probing reionization with Lyman-alpha emission lines
• Systematic Identification of LAEs for Visible Exploration and Reionization Research Using Subaru HSC (SILVERRUSH). I. Program Strategy and Clustering Properties of ~2,000 Lya Emitters at z=6-7 over the 0.3-0.5 Gpc${}^2$ Survey Area
• Can the intergalactic medium cause a rapid drop in Lyman alpha emission at z>6?
• The Giant Gemini GMOS survey of z>4.4 quasars - I. Measuring the mean free path across cosmic time
• Spectroscopic detections of CIII]1909 at z~6-7: A new probe of early star forming galaxies and cosmic reionisation
• An Atlas of z=5.7 and z=6.5 Ly alpha Emitters
• Inside-out or Outside-in: The topology of reionization in the photon-starved regime suggested by Lyman-alpha forest data
• Measurements of the UV background at 4.6 < z < 6.4 using the quasar proximity effect
• The Ly-alpha Properties of Faint Galaxies at z2-3 with Systemic Redshifts and Velocity Dispersions from Keck-MOSFIRE
• Consistent modelling of the meta-galactic UV background and the thermal/ionization history of the intergalactic medium
• The Sherwood simulation suite: overview and data comparisons with the Lyman-alpha forest at redshifts 2 < z < 5
• Identification of the brightest Lyα emitters at z=6.6: implications for the evolution of the luminosity function in the re-ionisation era
• The Galaxy Luminosity Function during the Reionization Epoch
• Accelerated Evolution of Ly$\alpha$ Luminosity Function at $\text{z}\gtrsim 7$ Revealed by the Subaru Ultra-Deep Survey for Ly$\alpha$ Emitters at $\text{z}=7.3$
• The Impact of The IGM on High-Redshift Lyman Alpha Emission Lines
• Fast Large Volume Simulations of the 21 cm Signal from the Reionization and pre-Reionization Epochs
• Star formation and the interstellar medium in z>6 UV-luminous Lyman-break galaxies
• First Results from the Lyman Alpha Galaxies in the Epoch of Reionization (LAGER) Survey: Cosmological Reionization at z ~ 7
• The nature and evolution of the highly ionized near-zones in the absorption spectra of z~6 quasars
• What is the physical origin of strong Lya emission? II. Gas Kinematics and Distribution of Lya Emitters
• A radiative transfer scheme for cosmological reionization based on a local Eddington tensor
• Radiative Transfer Modeling of Lyman Alpha Emitters. I. Statistics of Spectra and Luminosity
• The Detectability of Lyman Alpha Emission from Galaxies during the Epoch of Reionization
• Near-zone sizes and the rest frame extreme ultra-violet spectral index of the highest redshift quasars
• Lyman-alpha Emission from Structure Formation
• Smoothly-Rising Star Formation Histories During the Reionization Epoch
• Voigt Profile Fitting to Quasar Absorption Lines: An Analytic Approximation to the Voigt-Hjerting Function
• Lyman-alpha emitters gone missing: evidence for late reionization?
• A remarkably high fraction of strong Ly_alpha emitters amongst luminous redshift 6.0<z<6.5 Lyman break galaxies in the UKIDSS Ultra-Deep Survey
• The Global History of Reionisation
• The Lyman-alpha luminosity function at z=5.7-6.6 and the steep drop of the faint end: implications for reionization
• Green Pea Galaxies Reveal Secrets of Ly$\alpha$ Escape
• On the rapid demise of Lyman-alpha emitters at z>7 due to the increasing incidence of optically thick absorption systems
• A systematic study of Lyman-Alpha transfer through outflowing shells: Model parameter estimation
• The Faint End of the z=5 Quasar Luminosity Function from the CFHTLS
• Beacons into the Cosmic Dark Ages: Boosted transmission of Ly$\alpha$ from UV bright galaxies at $z\gtrsim 7$
• Ly$\alpha$ Spectra from Multiphase Outflows, and their Connection to Shell Models
• On the use of semi-numerical simulations in predicting the 21-cm signal from the epoch of reionization
• Inferences on the distribution of Ly-alpha emission of z~7 and z~8 galaxies
• A New Constraint on Reionization from Evolution of the Ly$\alpha$ Luminosity Function at $z\sim 6-7$ Probed by a Deep Census of $z=7.0$ Ly$\alpha$ Emitter Candidates to 0.3 $L^{\ast }$
• SILVERRUSH. VI. A simulation of Ly$\alpha$ emitters in the reionization epoch and a comparison with Subaru Hyper Suprime-Cam survey early data
• Lyman Alpha Emitter Evolution in the Reionization Epoch
• Lyman Alpha Emitters and Lyman Break Galaxies: dichotomous twins?
• A Model For Infall Around Virialized Halos
• Galactic Winds and Extended Lya Emission from the Host Galaxies of High Column Density QSO Absorption Systems
• Can galactic outflows explain the properties of Ly-alpha emitters?
• Simulating the 21-cm signal from reionisation including non-linear ionisations and inhomogeneous recombinations
• Lyman-Alpha Emitting Galaxies as a Probe of Reionization: Large-Scale Bubble Morphology and Small-Scale Absorbers
• On the faint-end of the high-$z$ galaxy luminosity function
• Large 21 cm signals from AGN-dominated reionization
• On the decreasing fraction of Strong Ly$\alpha$ Emitters around $z$ $\sim$ $6$-$7$
• Self-shielding of hydrogen in the IGM during the epoch of reionization
• The Minimum Halo Mass for Star Formation at z = 6 - 8
• Models of the Cosmological 21 cm Signal from the Epoch of Reionization Calibrated with Lyman-alpha and CMB Data
• Mapping the low surface brightness Universe in the UV band with Lya emission from IGM filaments

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• First study of reionization in tilted flat and untilted non-flat dynamical dark energy inflation models
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• Distinguishing AGN from starbursts as the origin of double peaked Lyman-Alpha Emitters in the reionization era
• Ly$\alpha$ Emission from [OIII] Emitters Near Reionization: The role of environment in galaxy Ly$\alpha$ detection
• The effect of ionizing background fluctuations on the spatial correlations of high redshift Ly$\alpha$-emitting galaxies
• Can luminous Lyman alpha emitters at $z$ $\simeq$ 5.7 and $z$ $\simeq$ 6.6 suppress star formation?