Astraeus VIII: A new framework for Lyman-$\alpha$ emitters applied to different reionisation scenarios

Abstract

We use the {\sc astraeus} framework to investigate how the visibility and spatial distribution of Lyman-$\alpha$ (Ly$\alpha$) emitters (LAEs) during reionisation is sensitive to a halo mass-dependent fraction of ionising radiation escaping from the galactic environment ($f_{\mathrm{esc}}$) and the ionisation topology. To this end, we consider the two physically plausible bracketing scenarios of $f_{\mathrm{esc}}$ increasing and decreasing with rising halo mass. We derive the corresponding observed Ly$\alpha$ luminosities of galaxies for three different analytic Ly$\alpha$ line profiles and associated Ly$\alpha$ escape fraction ($f_{\mathrm{esc}}^{\mathrm{Ly}\alpha }$) models: importantly, we introduce two novel analytic Ly$\alpha$ line profile models that describe the surrounding interstellar medium (ISM) as dusty gas clumps. They are based on parameterising results from radiative transfer simulations, with one of them relating $f_{\mathrm{esc}}^{\mathrm{Ly}\alpha }$ to $f_{\mathrm{esc}}$ by assuming the ISM of being interspersed with low-density tunnels. Our key findings are: (i) for dusty gas clumps, the Ly$\alpha$ line profile develops from a central to double peak profile as a galaxy's halo mass increases; (ii) LAEs are galaxies with $M_h\gtrsim 10^{10}{M}_{\odot }$ located in overdense and highly ionised regions; (iii) for this reason, the spatial distribution of LAEs is primarily sensitive to the global ionisation fraction and only weakly in second-order to the ionisation topology or a halo mass-dependent $f_{\mathrm{esc}}$; (iv) furthermore, as the observed Ly$\alpha$ luminosity functions reflect the Ly$\alpha$ emission from more massive galaxies, there is a degeneracy between the $f_{\mathrm{esc}}$-dependent intrinsic Ly$\alpha$ luminosity and the Ly$\alpha$ attenuation by dust in the ISM if $f_{\mathrm{esc}}$ does not exceed $\sim 50\%$.

arXiv comment25 pages, 9 figures; accepted for publication in MNRAS

References in corpus (115)

• The cosmological simulation code GADGET-2
• Starburst99: Synthesis Models for Galaxies with Active Star Formation
• The Formation of Galactic Disks
• Hierarchical Galaxy Formation
• The Rockstar Phase-Space Temporal Halo Finder and the Velocity Offsets of Cluster Cores
• Constraining the Evolution of the Ionizing Background and the Epoch of Reionization with z ~ 6 Quasars II: A Sample of 19 Quasars
• Effect of Reionization on the Structure Formation in the Universe
• Statistics of 207 Lya Emitters at a Redshift Near 7: Constraints on Reionization and Galaxy Formation Models
• Gravitationally Consistent Halo Catalogs and Merger Trees for Precision Cosmology
• Dust Formation in Primordial Type II Supernovae
• The Birth of a Galaxy - III. Propelling reionisation with the faintest galaxies
• Spectroscopic Confirmation of Three z-Dropout Galaxies at z = 6.844 - 7.213: Demographics of Lyman-Alpha Emission in z ~ 7 Galaxies
• The Universe is Reionizing at z~7: Bayesian Inference of the IGM Neutral Fraction Using Ly$\alpha$ Emission from Galaxies
• Escape fraction of ionizing photons during reionization: effects due to supernova feedback and runaway OB stars
• Luminosity functions of Lyman-alpha emitters at z=6.5, and z=5.7: evidence against reionization at z=6
• Implications for the Cosmic Reionization from the Optical Afterglow Spectrum of the Gamma-Ray Burst 050904 at z = 6.3
• Hydrogen reionisation ends by $z=5.3$: Lyman-$\alpha$ optical depth measured by the XQR-30 sample
• Using Lyman-alpha to detect galaxies that leak Lyman continuum
• Large Equivalent width Lyman-alpha line emission at z=4.5: young galaxies in a young universe
• Spectroscopic confirmation of z~7 LBGs: probing the earliest galaxies and the epoch of reionization
• Ly Alpha Emitters at z=5.7 in the Subaru Deep Field
• The delay-time distribution of type-Ia supernovae from Sloan II
• 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
• Extreme Feedback and the Epoch of Reionization: Clues in the Local Universe
• Dust-to-gas Ratio and Metal Abundance in Dwarf Galaxies
• Line Emitting Galaxies Beyond a Redshift of 7: An Improved Method for Estimating the Evolving Neutrality of the Intergalactic Medium
• New observations of z~7 galaxies: evidence for a patchy reionization
• Lyman-alpha Emission from a Luminous z=8.68 Galaxy: Implications for Galaxies as Tracers of Cosmic Reionization
• Studying Reionization with Ly-alpha Emitters
• Lyman Alpha Radiative Transfer in a Multi-Phase Medium
• Inferences on the Timeline of Reionization at z~8 From the KMOS Lens-Amplified Spectroscopic Survey
• Completing the Census of Ly-alpha Emitters at the Reionization Epoch
• A Spectroscopic Redshift Measurement for a Luminous Lyman Break Galaxy at z=7.730 using Keck/MOSFIRE
• Z > 7 galaxies with red Spitzer/IRAC [3.6]-[4.5] colors in the full CANDELS data set: the brightest-known galaxies at Z ~ 7-9 and a probable spectroscopic confirmation at Z=7.48
• Dust formation history of galaxies: a critical role of metallicity for the dust mass growth by accreting materials in the interstellar medium
• Lyman-alpha spectral properties of five newly discovered Lyman continuum emitters
• Lyman-alpha Cooling Emission from Galaxy Formation
• Cosmic Dawn (CoDa): the First Radiation-Hydrodynamics Simulation of Reionization and Galaxy Formation in the Local Universe
• Galaxy Properties and UV Escape Fractions During Epoch of Reionization: Results from the Renaissance Simulations
• Can the intergalactic medium cause a rapid drop in Lyman alpha emission at z>6?
• Intergalactic Transmission and its Impact on the Lyα Line
• Feedback-regulated star formation and escape of LyC photons from mini-haloes during reionisation
• Spectroscopic confirmation of two Lyman break galaxies at redshift beyond 7
• Long troughs in the Lyman-$\alpha$ forest below redshift 6 due to islands of neutral hydrogen
• Accelerated Evolution of Ly$\alpha$ Luminosity Function at $\text{z}\gtrsim 7$ Revealed by the Subaru Ultra-Deep Survey for Ly$\alpha$ Emitters at $\text{z}=7.3$
• Essential physics of early galaxy formation
• First Results from the Lyman Alpha Galaxies in the Epoch of Reionization (LAGER) Survey: Cosmological Reionization at z ~ 7
• Spectroscopy of z ~ 7 candidate galaxies: Using Lyman-alpha to constrain the neutral fraction of hydrogen in the high-redshift universe
• The LyA-LyC Connection: Evidence for an Enhanced Contribution of UV-faint Galaxies to Cosmic Reionization
• Texas Spectroscopic Search for Ly$\alpha$ Emission at the End of Reionization III. the Ly$\alpha$ Equivalent-width Distribution and Ionized Structures at $z>7$
• The Structure of Multiphase Galactic Winds
• The THESAN project: properties of the intergalactic medium and its connection to Reionization-era galaxies
• The ALMA REBELS Survey: the dust content of $z\sim 7$ Lyman Break Galaxies
• Astraeus I: The interplay between galaxy formation and reionization
• CANDELSz7: a large spectroscopic survey of CANDELS galaxies in the reionization epoch
• New Insights on Ly-alpha and Lyman Continuum Radiative Transfer in the Greenest Peas
• Understanding the escape of LyC and Ly$\alpha$ photons from turbulent clouds
• Cosmic Reionization On Computers II. Reionization History and Its Back Reaction on Early Galaxies
• The origin of the escape of Lyman alpha and ionizing photons in Lyman Continuum Emitters
• Modelling Element Abundances in Semi-analytic Models of Galaxy Formation
• Lyman Radiation Hydrodynamics of Turbulent H II Regions in Molecular Clouds: A Physical Origin of LyC Leakage and the Associated Ly$\alpha$ Spectra
• On the Use of Ly-alpha Emitters as Probes of Reionization
• Escape Fraction of Ionizing Radiation from Starburst Galaxies at High Redshifts
• Onset of Cosmic Reionization: Evidence of An Ionized Bubble Merely 680 Myrs after the Big Bang
• Inferences on the distribution of Ly-alpha emission of z~7 and z~8 galaxies
• Lyman Alpha Emitters at z=7 in the Subaru/XMM-Newton Deep Survey Field: Photometric Candidates and Luminosity Function
• No Evidence for Lyman-alpha Emission in Spectroscopy of z > 7 Candidate Galaxies
• The visibility of Lyman Alpha Emitters during reionization
• 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 $L^{\ast }$
• Puzzling Lyman-alpha line profiles in green pea galaxies
• Is Multiphase Gas Cloudy or Misty?
• Chasing the Tail of Cosmic Reionization with Dark Gap Statistics in the Ly$\alpha$ Forest over $5<z<6$
• First observational support for overlapping reionized bubbles generated by a galaxy overdensity
• An Ultraluminous Lyman Alpha Emitter with a Blue Wing at z=6.6
• A Lyman-α protocluster at redshift 6.9
• The accuracy of semi-numerical reionization models in comparison with radiative transfer simulations
• Probing Intergalactic Neutral Hydrogen by the Lyman Alpha Red Damping Wing of Gamma-Ray Burst 130606A Afterglow Spectrum at z = 5.913
• The origin of dust in galaxies across cosmic time
• The 21cm bispectrum during reionization: a tracer of the ionization topology
• Modeling $237$ Lyman-$\alpha$ spectra of the MUSE-Wide survey
• Complex Lyman Alpha Profiles in Redshift 6.6 Ultraluminous Lyman Alpha Emitters
• Strong Ly$\alpha$ Emission in an Overdense Region at $z=6.8$: A Very Large ($R\sim 3$ physical Mpc) Ionized Bubble in COSMOS?
• Reionization Through the Lens of Percolation Theory
• Lyman-alpha emitters gone missing: the different evolution of the bright and faint populations
• CHORUS II. Subaru/HSC Determination of the Ly$\alpha$ Luminosity Function at $z=7.0$: Constraints on Cosmic Reionization Model Parameter
• Modelling the observed luminosity function and clustering evolution of Lyman-$\alpha$ emitters: growing evidence for late reionization
• Lyman-$\alpha$ as a tracer of cosmic reionisation in the SPHINX radiation-hydrodynamics cosmological simulation
• Spectroscopic investigation of a reionized galaxy overdensity at z=7
• Galactic ionising photon budget during the Epoch of Reionisation in the Cosmic Dawn II simulation
• Modeling UV Radiation Feedback from Massive Stars: III. Escape of Radiation from Star-forming Giant Molecular Clouds
• Simulating the diversity of shapes of the Lyman-$\alpha$ line
• The ALMA REBELS Survey: Efficient Ly$\alpha$ Transmission of UV-Bright z$\simeq$7 Galaxies from Large Velocity Offsets and Broad Line Widths
• SILVERRUSH. II. First Catalogs and Properties of ~2,000 Lya Emitters and Blobs at z~6-7 Identified over the 14-21 deg2 Sky
• Spectroscopically Confirmed Lyman-Alpha Emitters from Redshift 5 to 7 Behind Ten Galaxy Cluster Lenses
• The Stellar Mass, Star Formation Rate and Dark Matter Halo Properties of LAEs at $z\sim 2$
• Equivalent widths of Lyman $\alpha$ emitters in MUSE-Wide and MUSE-Deep
• The visibility of Lyman Alpha Emitters: constraining reionization, ionizing photons and dust
• A systematic study of the escape of LyC and Ly$\alpha$ photons from star-forming, magnetized turbulent clouds
• The Little Galaxies that Could (Reionize the Universe): Predicting Faint End Slopes & Escape Fractions at z > 4
• Exploring 21cm - Lyman Alpha emitter synergies for SKA
• Astraeus V: The emergence and evolution of metallicity scaling relations during the Epoch of Reionization
• Chasing Lyman alpha-emitting galaxies at z = 8.8
• Double-peaked Lyman-$\alpha$ emission at z=6.803: a reionisation-era galaxy self-ionising its local HII bubble
• Simulating Star Clusters Across Cosmic Time: II. Escape Fraction of Ionizing Photons from Molecular Clouds
• Stages of Reionization as revealed by the Minkowski Functionals
• Dark-ages Reionization and Galaxy Formation Simulation XX. The Ly$\alpha$ IGM transmission properties and environment of bright galaxies during the Epoch of Reionization
• CLARA's view on the escape fraction of Lyman-Alpha photons in high redshift galaxies
• Simulating the UV Escape Fractions from Molecular Cloud Populations in Star-forming Dwarf and Spiral Galaxies
• The Escape Fraction of Ionizing Photons During the Epoch of Reionization: observability with the Square Kilometre Array
• Clustering and lifetime of Lyman Alpha Emitters in the Epoch of Reionization
• The Effect of Bi-conical Outflows on Ly$\alpha$ Escape From Green Peas
• A study of simulated histories of reionization with merger trees of HII regions
• Astraeus III: The environment and physical properties of reionization sources
• Variation in the escape fraction of ionising photons from galaxies and the redshifted 21-cm power spectrum during reionization
• Astraeus VII: The environmental-dependent assembly of galaxies in the Epoch of Reionization

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• The JWST-PRIMAL Legacy Survey. A JWST/NIRSpec reference sample for the physical properties and Lyman-$\alpha$ absorption and emission of $\sim 500$ galaxies at $z=5.5-13.4$
• The impact of an evolving stellar initial mass function on early galaxies and reionisation
• JADES: The star-formation and chemical enrichment history of a luminous galaxy at z~9.43 probed by ultra-deep JWST/NIRSpec spectroscopy
• JADES: Primaeval Lyman-$\alpha$ emitting galaxies reveal early sites of reionisation out to redshift $z\sim 9$
• Euclid preparation. The Cosmic Dawn Survey (DAWN) of the Euclid Deep and Auxiliary Fields
• Simulation-Based Inference of the sky-averaged 21-cm signal from CD-EoR with REACH
• Mapping reionization bubbles in the JWST era II: inferring the position and characteristic size of individual bubbles
• The 21cm-galaxy cross-correlation: Realistic forecast for 21cm signal detection and reionisation constraints
• Mapping neutral islands during end stages of reionization with photometric intergalactic medium tomography
• Deep JWST spectroscopy of galaxies in a candidate ionized bubble at $z=8.7$: probing reionization at pMpc scales with Ly$\alpha$ emission