An Effective Model for the Cosmic-Dawn 21-cm Signal

Abstract

The 21-cm signal holds the key to understanding the first structure formation during cosmic dawn. Theoretical progress over the last decade has focused on simulations of this signal, given the nonlinear and nonlocal relation between initial conditions and observables (21-cm or reionization maps). Here, instead, we propose an {\it effective} and fully analytic model for the 21-cm signal during cosmic dawn. We take advantage of the exponential-like behavior of the local star-formation rate density (SFRD) against densities at early times to analytically find its correlation functions including nonlinearities. The SFRD acts as the building block to obtain the statistics of radiative fields (X-ray and Lyman-$\alpha$ fluxes), and therefore the 21-cm signal. We implement this model as the public Python package Zeus21. This code can fully predict the 21-cm global signal and power spectrum in $\sim 1$ s, with negligible memory requirements. When comparing against state-of-the-art semi-numerical simulations from 21CMFAST we find agreement to $\sim 10\%$ precision in both the 21-cm global signal and power spectra, after accounting for a (previously missed) underestimation of adiabatic fluctuations in 21CMFAST. Zeus21 is modular, allowing the user to vary the astrophysical model for the first galaxies, and interfaces with the cosmological code CLASS, which enables searches for beyond standard-model cosmology in 21-cm data. This represents a step towards bringing 21-cm to the era of precision cosmology.

arXiv comment20+4 pages, 21+4 figures. Updated to match accepted version. Code available at https://github.com/JulianBMunoz/Zeus21

References in corpus (115)

• The NumPy array: a structure for efficient numerical computation
• LOFAR: The LOw-Frequency ARray
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• High Redshift Galaxies in the Hubble Deep Field. Color Selection and Star Formation History to z=4
• Axion Cosmology
• Atomic Data for Astrophysics. II. New Analytic Fits for Photoionization Cross Sections of Atoms and Ions
• Ellipsoidal collapse and an improved model for the number and spatial distribution of dark matter haloes
• Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
• Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
• Mass function of dark matter halos
• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• In the Beginning: The First Sources of Light and the Reionization of the Universe
• Concentrations of Dark Halos from their Assembly Histories
• An absorption profile centred at 78 megahertz in the sky-averaged spectrum
• Halo Formation in Warm Dark Matter Models
• 21-cm cosmology
• The First Stars
• 21cmFAST: A Fast, Semi-Numerical Simulation of the High-Redshift 21-cm Signal
• Radiative Transfer in a Clumpy Universe: III. The Nature of Cosmological Ionizing Sources
• Hydrogen Epoch of Reionization Array (HERA)
• Transients from Initial Conditions in Cosmological Simulations
• The Growth of HII Regions During Reionization
• Efficient Simulations of Early Structure Formation and Reionization
• New Determinations of the UV Luminosity Functions from z~9 to z~2 show a remarkable consistency with halo growth and a constant star formation efficiency
• Second-Generation Objects in the Universe: Radiative Cooling and Collapse of Halos with Virial Temperatures Above 10^4 Kelvin
• Measuring the Small-Scale Power Spectrum of Cosmic Density Fluctuations Through 21 cm Tomography Prior to the Epoch of Structure Formation
• Simulations and Analytic Calculations of Bubble Growth During Hydrogen Reionization
• A Per-Baseline, Delay-Spectrum Technique for Accessing the 21cm Cosmic Reionization Signature
• Hydrogen reionisation ends by $z=5.3$: Lyman-$\alpha$ optical depth measured by the XQR-30 sample
• Rapid Reionization by the Oligarchs: The Case for Massive, UV-Bright, Star-Forming Galaxies with High Escape Fractions
• Insights on Dark Matter from Hydrogen during Cosmic Dawn
• Detecting the Earliest Galaxies Through Two New Sources of 21cm Fluctuations
• The Epoch of Reionization Window: I. Mathematical Formalism
• The Galaxy UV Luminosity Function Before the Epoch of Reionization
• The GLASS James Webb Space Telescope Early Release Science Program. I. Survey Design and Release Plans
• 21 cm fluctuations from inhomogeneous X-ray heating before reionization
• Identification and properties of intense star-forming galaxies at redshifts z>10
• Wouthuysen-Field coupling strength and application to high-redshift 21 cm radiation
• Natural Downsizing in Hierarchical Galaxy Formation
• Inferring the astrophysics of reionization and cosmic dawn from galaxy luminosity functions and the 21-cm signal
• HyRec: A fast and highly accurate primordial hydrogen and helium recombination code
• A redshift-independent efficiency model: star formation and stellar masses in dark matter halos at z>4
• ETHOS - An Effective Theory of Structure Formation: From dark particle physics to the matter distribution of the Universe
• 21CMMC: an MCMC analysis tool enabling astrophysical parameter studies of the cosmic 21 cm signal
• Concerns about Modelling of the EDGES Data
• Data Analysis for Precision 21 cm Cosmology
• Introducing the THESAN project: radiation-magnetohydrodynamic simulations of the epoch of reionization
• Energy Feedback from X-ray Binaries in the Early Universe
• The Epoch of Reionization Window: II. Statistical Methods for Foreground Wedge Reduction
• Comparison Of Reionization Models: Radiative Transfer Simulations And Approximate, Semi-Numeric Models
• Renormalized Halo Bias
• The observable signature of late heating of the Universe during cosmic reionization
• Improved Constraints on the 21 cm EoR Power Spectrum and the X-Ray Heating of the IGM with HERA Phase I Observations
• Inhomogeneous recombinations during cosmic reionization
• Cosmic Reionization On Computers I. Design and Calibration of Simulations
• The signature of the first stars in atomic hydrogen at redshift 20
• First Season MWA EoR Power Spectrum Results at Redshift 7
• Improving lognormal models for cosmological fields
• Probing the Dark Ages at Z~20: The SCI-HI 21 cm All-Sky Spectrum Experiment
• The 21cm angular-power spectrum from the dark ages
• Fast Large Volume Simulations of the 21 cm Signal from the Reionization and pre-Reionization Epochs
• The 21-cm signature of the first stars during the Lyman-Werner feedback era
• The X-ray spectra of the first galaxies: 21cm signatures
• The Global 21-cm Signal in the Context of the High-z Galaxy Luminosity Function
• Reionization and high-redshift galaxies: the view from quasar absorption lines
• 21cmFAST v3: A Python-integrated C code forgenerating 3D realizations of the cosmic 21cm signal
• Local radiative feedback in the formation of the first protogalaxies
• Dark-ages reionization and galaxy formation simulation - III. Modelling galaxy formation and the epoch of reionization
• Descending from on high: Lyman series cascades and spin-kinetic temperature coupling in the 21 cm line
• Redshift Space Distortion of the 21cm Background from the Epoch of Reionization I: Methodology Re-examined
• The Effects of Dark Matter Decay and Annihilation on the High-Redshift 21 cm Background
• The Impact of the First Galaxies on Cosmic Dawn and Reionization
• Reionization and galaxy inference from the high-redshift Lyα forest
• Large-scale BAO signatures of the smallest galaxies
• Secondary ionization and heating by fast electrons
• 21 cm signal from cosmic dawn: Imprints of spin temperature fluctuations and peculiar velocities
• Primordial non-gaussianity from the bispectrum of 21-cm fluctuations in the dark ages
• Emulating Simulations of Cosmic Dawn for 21cm Power Spectrum Constraints on Cosmology, Reionization, and X-ray Heating
• Reionization on Large Scales I: A Parametric Model Constructed from Radiation-Hydrodynamic Simulations
• Constraining Non-Cold Dark Matter Models with the Global 21-cm Signal
• Cosmic Reionization and the 21-cm signal: Comparison between an analytical model and a simulation
• Fast Large-Scale Reionization Simulations
• 21-cm Fluctuations from Charged Dark Matter
• Decoding the X-ray Properties of Pre-Reionization Era Sources
• On the use of semi-numerical simulations in predicting the 21-cm signal from the epoch of reionization
• High Mass X-ray Binaries and the Cosmic 21-cm Signal: Impact of Host Galaxy Absorption
• A Minimalist Feedback-Regulated Model for Galaxy Formation During the Epoch of Reionization
• Heating of the intergalactic medium by the cosmic microwave background during cosmic dawn
• The Impact of Scatter in the Galaxy UV Luminosity to Halo Mass Relation on Ly$\alpha$ Visibility During the Epoch of Reionization
• Model-independent constraints on the hydrogen-ionizing emissivity at z>6
• The THESAN project: ionizing escape fractions of reionization-era galaxies
• Robust Velocity-induced Acoustic Oscillations at Cosmic Dawn
• The accuracy of semi-numerical reionization models in comparison with radiative transfer simulations
• The 21 cm signal and the interplay between dark matter annihilations and astrophysical processes
• The Impact of Foregrounds on Redshift Space Distortion Measurements With the Highly-Redshifted 21 cm Line
• Reionization Through the Lens of Percolation Theory
• New Roads to the Small-Scale Universe: Measurements of the Clustering of Matter with the High-Redshift UV Galaxy Luminosity Function
• Fuzzy Dark Matter and the 21cm Power Spectrum
• Prediction of the 21-cm signal from reionization: comparison between 3D and 1D radiative transfer schemes
• Fluctuations in the High-Redshift Lyman-Werner and Lyman-alpha Radiation Backgrounds
• Light-cone anisotropy in 21cm fluctuations during the epoch of reionization
• Non-linear Redshift-Space Power Spectra
• A halo model approach for the 21-cm power spectrum at cosmic dawn
• The observable 21cm signal from reionization may be perturbative
• Minimum size of 21-cm simulations
• Redshift-space distortions in simulations of the 21-cm signal from the cosmic dawn
• First Constraints on Small-Scale Non-Gaussianity from UV Galaxy Luminosity Functions
• Powerbox: A Python package for creating structured fields with isotropic power spectra
• Structure Formation and the Global 21-cm Signal in the Presence of Coulomb-like Dark Matter-Baryon Interactions
• ETHOS -- An Effective Theory of Structure Formation: Impact of Dark Acoustic Oscillations on Cosmic Dawn
• An Effective Bias Expansion for 21 cm Cosmology in Redshift Space
• Cosmic Variance of the 21-cm Global Signal
• Suppressing variance in 21-cm signal simulations during reionization
• A galaxy-free phenomenological model for the 21-cm power spectrum during reionization
• A fully Lagrangian, non-parametric bias model for dark-matter halos

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• Constraining the X-ray heating and reionization using 21-cm power spectra with Marginal Neural Ratio Estimation
• BEoRN: A fast and flexible framework to simulate the epoch of reionisation and cosmic dawn
• Exploiting synergies between JWST and cosmic 21-cm observations to uncover star formation in the early Universe
• 21cmFirstCLASS I. Cosmological tool for $\Lambda$CDM and beyond
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• The First Billion Years in Seconds: An Effective Model for the 21-cm Signal with Population III Stars
• 21cmFirstCLASS II. Early linear fluctuations of the 21cm signal
• A Global Semi-Analytic Model of the First Stars and Galaxies Including Dark Matter Halo Merger Histories
• Probing Dark Relativistic Species and Their Interactions with Dark Matter through CMB and 21cm surveys
• Effects of feedback-free starburst galaxies on the 21-cm signal and reionization history
• Deep learning-driven likelihood-free parameter inference for 21-cm forest observations
• Joint 21-cm and CMB Forecasts for Constraining Self-Interacting Massive Neutrinos
• Probing light relics through cosmic dawn
• 21-cm Constraints on Dark Matter Annihilation after an Early Matter-Dominated Era
• The long-lasting effect of X-ray preheating in the post-reionization intergalactic medium
• Relatively Fast and Reasonably Furious: Evidence for Increased Burstiness in Smaller Halos at Cosmic Dawn
• Narrowing the discovery space of the cosmological 21-cm signal using multi-wavelength constraints
• ECHO21: a tool for modelling global 21-cm signal from dark ages to reionization
• The Effects of Dark Matter Annihilation and Dark Matter-Baryon Velocity Offsets at Cosmic Dawn
• Probing Non-Minimal Dark Sectors via the 21 cm Line at Cosmic Dawn
• Astrophysical uncertainties challenge 21-cm forecasts: A primordial black hole case study
• oLIMpus: An Effective Model for Line Intensity Mapping Auto- and Cross- Power Spectra in Cosmic Dawn and Reionization
• Analytical modeling of the one-dimensional power spectrum of 21-cm forest based on a halo model method
• On the accuracy of posterior recovery with neural network emulators
• Calibrating Bayesian Tension Statistics using Neural Ratio Estimation
• From Dark Matter Minihalos to Large-Scale Radiative Feedback: A Self-Consistent 3D Simulation of the First Stars and Galaxies using Neural Networks
• A New Boundary Condition on Reionization