Impact of the Primordial Stellar Initial Mass Function on the 21-cm Signal

Abstract

Properties of the first generation of stars (Pop III), such as their initial mass function (IMF), are poorly constrained by observations and have yet to converge between simulations. The cosmological 21-cm signal of neutral hydrogen is predicted to be sensitive to Lyman-band photons produced by these stars, thus providing a unique way to probe the first stellar population. In this paper, we investigate the impacts of the Pop III IMF on the cosmic dawn 21-cm signal via the Wouthuysen-Field effect, Lyman-Werner feedback, Ly-alpha heating, and CMB heating. We calculate the emission spectra of star-forming halos for different IMFs by integrating over individual metal-free stellar spectra, computed from a set of stellar evolution histories and stellar atmospheres, and taking into account variability of the spectra with stellar age. Through this study, we therefore relax two common assumptions: that the zero-age main sequence emission rate of a Pop III star is representative of its lifetime mean emission rate, and that Pop III emission can be treated as instantaneous. Exploring a bottom-heavy, a top-heavy, and intermediate IMFs, we show that variations in the 21-cm signal are driven by stars lighter than 20 solar masses. For the explored models we find maximum relative differences of 59% in the cosmic dawn global 21-cm signal, and 131% between power spectra. Although this impact is modest, precise modelling of the first stars and their evolution is necessary for accurate prediction and interpretation of the 21-cm signal.

arXiv comment20 pages, 16 figures. Accepted for publication in MNRAS, updated to accepted version

References in corpus (118)

• Starburst99: Synthesis Models for Galaxies with Active Star Formation
• Large scale bias and the peak background split
• How Massive Single Stars End their Life
• Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• An absorption profile centred at 78 megahertz in the sky-averaged spectrum
• A Cosmology Calculator for the World Wide Web
• 21-cm cosmology
• The First Stars
• On the properties of massive Population III stars and metal-free stellar populations
• 21-cm Tomography of the Intergalactic Medium at High Redshift
• 21cmFAST: A Fast, Semi-Numerical Simulation of the High-Redshift 21-cm Signal
• A Grid of NLTE Line-Blanketed Model Atmospheres of O-type Stars
• Nucleosynthesis and Remnants in Massive Stars of Solar Metallicity
• A Grid of NLTE Line-Blanketed Model Atmospheres of Early B-type Stars
• One Hundred First Stars : Protostellar Evolution and the Final Masses
• Possible interaction between baryons and dark-matter particles revealed by the first stars
• Near-Field Cosmology with Metal-Poor Stars
• Simulations on a Moving Mesh: The Clustered Formation of Population III Protostars
• The Birth of a Galaxy: Primordial Metal Enrichment and Stellar Populations
• Relative velocity of dark matter and baryonic fluids and the formation of the first structures
• Generic Spectrum and Ionization Efficiency of a Heavy Initial Mass Function for the First Stars
• Simulations of Pregalactic Structure Formation with Radiative Feedback
• The Radiative Feedback of the First Cosmological Objects
• Mind the gap: The location of the lower edge of the pair instability supernovae black hole mass gap
• Cosmological Formation of Low-Mass Objects
• Formation of the First Stars
• Improved upper limits on the 21-cm signal power spectrum of neutral hydrogen at $\mathbf{z}\approx 9.1$ from LOFAR
• The first stars: formation of binaries and small multiple systems
• Unusually Large Fluctuations in the Statistics of Galaxy Formation at High Redshift
• Detecting the Earliest Galaxies Through Two New Sources of 21cm Fluctuations
• Building up the Population III initial mass function from cosmological initial conditions
• Population III stars: hidden or disappeared ?
• Enhanced global signal of neutral hydrogen due to excess radiation at cosmic dawn
• Concerns about Modelling of the EDGES Data
• X-ray Preionisation Powered by Accretion on the First Black Holes. I: a Model for the WMAP Polarisation Measurement
• Zero-metallicity stars I. Evolution at constant mass
• Energy Feedback from X-ray Binaries in the Early Universe
• Modeling the Radio Background from the First Black Holes at Cosmic Dawn: Implications for the 21 cm Absorption Amplitude
• The observable signature of late heating of the Universe during cosmic reionization
• First Results from HERA Phase I: Upper Limits on the Epoch of Reionization 21 cm Power Spectrum
• The First Billion Years project - III: The impact of stellar radiation on the coevolution of Populations II and III
• Signature of Excess Radio Background in the 21-cm Global Signal and Power Spectrum
• Impact of the Relative Motion between the Dark Matter and Baryons on the First Stars
• Two populations of metal-free stars in the early Universe
• What does the first highly-redshifted 21-cm detection tell us about early galaxies?
• The signature of the first stars in atomic hydrogen at redshift 20
• The 21-cm signature of the first stars during the Lyman-Werner feedback era
• The Era of Massive Population III Stars: Cosmological Implications and Self-Termination
• The X-ray spectra of the first galaxies: 21cm signatures
• The First Population II Stars Formed in Externally Enriched Mini-halos
• Reviving Millicharged Dark Matter for 21-cm Cosmology
• Testing for calibration systematics in the EDGES low-band data using Bayesian model selection
• The Initial mass function of the first stars inferred from extremely metal-poor stars
• Simulating cosmic metal enrichment by the first galaxies
• The Inhomogeneous Background of Hydrogen-Molecule Dissociating Radiation during Cosmic Reionization
• The Inhomogeneous Background of H2 Dissociating Radiation During Cosmic Reionization
• A Ground Plane Artifact that Induces an Absorption Profile in Averaged Spectra from Global 21-cm Measurements - with Possible Application to EDGES
• The Birth of a Massive First-Star Binary
• Descending from on high: Lyman series cascades and spin-kinetic temperature coupling in the 21 cm line
• The Impact of the First Galaxies on Cosmic Dawn and Reionization
• The redshifted 21-cm signal in the EDGES low-band spectrum
• The Rise of the First Stars: Supersonic Streaming, Radiative Feedback, and 21-cm Cosmology
• Constraining the primordial initial mass function with stellar archaeology
• The REACH radiometer for detecting the 21-cm hydrogen signal from redshift 7.5 to 28
• First Limits on the 21 cm Power Spectrum during the Epoch of X-ray heating
• Limits on Pop III star formation with the most iron-poor stars
• Formation and survival of Population III stellar systems
• SARAS 2 constraints on global 21-cm signals from the Epoch of Reionization
• Decoding the stellar fossils of the dusty Milky Way progenitors
• 21-cm Fluctuations from Charged Dark Matter
• On the observability of individual Population III stars and their stellar-mass black hole accretion disks through cluster caustic transits
• The Stellar Initial Mass Function
• On the photodissociation of H2 by the first stars
• Legacy of star formation in the pre-reionization universe
• Formation sites of Population III star formation: The effects of different levels of rotation and turbulence on the fragmentation behavior of primordial gas
• Merge or survive: Number of Population III stars per minihalo
• Zero-metallicity stars II. Evolution of very massive objects with mass loss
• The importance of magnetic fields for the initial mass function of the first stars
• High-redshift radio galaxies: a potential new source of 21-cm fluctuations
• X-ray Preionisation Powered by Accretion on the First Black Holes. II: Cosmological Simulations and Observational Signatures
• Heating of the intergalactic medium by the cosmic microwave background during cosmic dawn
• The subtlety of Ly-a photons: changing the expected range of the 21-cm signal
• Emulating the Global 21-cm Signal from Cosmic Dawn and Reionization
• The Effects of Population III X-ray and Radio Backgrounds on the Cosmological 21-cm Signal
• The Persistence of Population III Star Formation
• Unique Signatures of Population III Stars in the Global 21-cm Signal
• UV pumping of hyperfine transitions in the light elements, with application to 21-cm hydrogen and 92-cm deuterium lines from the early universe
• Constraining First Star Formation with 21cm-Cosmology
• Grids of stellar models with rotation: V. Models from 1.7 to 120 Msun at zero metallicity
• Charting the Parameter Space of the 21-cm Power Spectrum
• Lyman-$\alpha$ coupling and heating at Cosmic Dawn
• Following the Cosmic Evolution of Pristine Gas II: The search for Pop III-Bright Galaxies
• The Mass Distribution of Population III Stars
• Radio background and IGM heating due to Pop III supernovae explosions
• Fluctuations in the High-Redshift Lyman-Werner and Lyman-alpha Radiation Backgrounds
• Magnetic field amplification in accretion discs around the first stars: implications for the primordial IMF
• A 21-cm power spectrum at 48 MHz, using the Owens Valley Long Wavelength Array
• Self-consistent semi-analytic models of the first stars
• The 21-cm BAO signature of enriched low-mass galaxies during cosmic reionization
• Observational constraints on the survival of pristine stars
• Lyalpha versus X-ray heating in the high-z IGM
• Properties of reionization-era galaxies from JWST luminosity functions and 21-cm interferometry
• Implications of inhomogeneous metal mixing for stellar archaeology
• How the First Stars Regulated Star Formation. II. Enrichment by Nearby Supernovae
• Informing antenna design for sky-averaged 21-cm experiments using a simulated Bayesian data analysis pipeline
• X-ray Background at High Redshifts from Pop III Remnants: Results from Pop III star formation rates in the Renaissance Simulations
• A hint on the metal-free star formation rate density from 21cm-EDGES data
• Probing the first galaxies with the SKA
• Constraining Warm Dark Matter and Pop III stars with the Global 21-cm Signal
• Shot noise and scatter in the star formation efficiency as a source of 21-cm fluctuations
• Can the 21 cm signal probe Population III and II star formation?
• UV regulated star formation in high-redshift galaxies
• External Enrichment of Minihalos by the First Supernovae
• Ionizing photon production of Population III stars: effects of rotation, convection, and initial mass function
• Modelling Population III stars for semi-numerical simulations
• Stellar mass dependence of the 21-cm signal around the first star and its impact on the global signal
• Epoch of Reionization Power Spectrum Limits from Murchison Widefield Array Data Targeted at EoR1 Field

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• The Science of the Einstein Telescope
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• A needle in a haystack? Catching Pop III stars in the Epoch of Reionization: I. Pop III star forming environments
• RIGEL: Simulating dwarf galaxies at solar mass resolution with radiative transfer and feedback from individual massive stars
• Modelling the cosmological Lyman-Werner background radiation field in the Early Universe
• Signatures of Cosmic Ray Heating in 21-cm Observables
• Exploiting synergies between JWST and cosmic 21-cm observations to uncover star formation in the early Universe
• The role of Pop III stars and early black holes in the 21cm signal from Cosmic Dawn
• Gravitational waves from mergers of Population III binary black holes: roles played by two evolution channels
• The most massive Population III stars
• Machine-learning recovery of foreground wedge-removed 21-cm light cones for high-$z$ galaxy mapping
• The First Billion Years in Seconds: An Effective Model for the 21-cm Signal with Population III Stars
• The THESAN-ZOOM project: Population III star formation continues until the end of reionization
• Distinguishing the impact and signature of black holes from different origins in early cosmic history
• Cosmic mysteries and the hydrogen 21-cm line: bridging the gap with lunar observations
• Impact of cosmic rays on the global 21-cm signal during cosmic dawn
• The mass distribution of the first stars can be determined via the 21-cm signal
• Effects of chemically homogeneous evolution of the first stars on the 21-cm signal and reionization
• Understanding spectral artefacts in SKA-LOW 21-cm cosmology experiments: the impact of cable reflections
• Narrowing the discovery space of the cosmological 21-cm signal using multi-wavelength constraints
• Predictions of the 21cm global signal in the JWST and ALMA era
• Ultraviolet photon production rates of the first stars: Impact on the He II $\lambda$ 1640 Å emission line from primordial star clusters and the 21-cm signal from cosmic dawn
• RIGEL: Feedback-regulated cloud-scale star formation efficiency in a simulated dwarf galaxy merger
• Influence of the deviation of the matter power spectrum at small scales on the global 21-cm signal at cosmic dawn
• Calibrating Bayesian Tension Statistics using Neural Ratio Estimation
• Optimizing Foreground Modelling for Global 21cm Cosmology with GPU-Accelerated Nested Sampling