A Standard Ruler at Cosmic Dawn

Abstract

The matter in our Universe comes in two flavors: dark and baryonic. Of these, only the latter couples to photons, giving rise to the well-known baryon acoustic oscillations and, in the process, generating supersonic relative velocities between dark matter and baryons. These velocities---imprinted with the acoustic scale in their genesis---impede the formation of the first stars during cosmic dawn ($z\sim 20$), modulating the expected 21-cm signal from this era. In a companion paper we showed, combining numerical simulations and analytic models, that this modulation takes the form of robust velocity-induced acoustic oscillations (VAOs), with a well-understood shape that is frozen at recombination, and unaffected by the unknown astrophysics of star formation. Here we propose using these VAOs as a standard ruler at cosmic dawn. We find that three years of 21-cm power-spectrum data from the upcoming HERA interferometer should be able to measure the Hubble expansion rate $H(z)$ at $z=15-20$ to percent-level precision, ranging from $0.3\%$ to $11\%$ depending on the strength of astrophysical feedback processes and foregrounds. This would provide a new handle on the expansion rate of our Universe during an otherwise unprobed epoch, opening a window to the mysterious cosmic-dawn era.

arXiv comment7 pages, 3 figures. Updated to match accepted version

References in corpus (83)

• emcee: The MCMC Hammer
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• Baryonic Features in the Matter Transfer Function
• A 2.4% Determination of the Local Value of the Hubble Constant
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
• Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
• Cosmology at Low Frequencies: The 21 cm Transition and the High-Redshift Universe
• The Formation of the First Star in the Universe
• In the Beginning: The First Sources of Light and the Reionization of the Universe
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• H0LiCOW XIII. A 2.4% measurement of $H_0$ from lensed quasars: $5.3\sigma$ tension between early and late-Universe probes
• Massive neutrinos and cosmology
• Early Dark Energy Can Resolve The Hubble Tension
• 21-cm cosmology
• The First Stars
• 21cmFAST: A Fast, Semi-Numerical Simulation of the High-Redshift 21-cm Signal
• Hydrogen Epoch of Reionization Array (HERA)
• The history of star formation in a LCDM universe
• Massloss of galaxies due to a UV-background
• Relative velocity of dark matter and baryonic fluids and the formation of the first structures
• Measurement of BAO correlations at $z=2.3$ with SDSS DR12 \lya-Forests
• Early dark energy, the Hubble-parameter tension, and the string axiverse
• Second-Generation Objects in the Universe: Radiative Cooling and Collapse of Halos with Virial Temperatures Above 10^4 Kelvin
• Simulations of Pregalactic Structure Formation with Radiative Feedback
• Baryon Acoustic Oscillation Intensity Mapping as a Test of Dark Energy
• Bright Source Subtraction Requirements For Redshifted 21 cm Measurements
• What Next-Generation 21 cm Power Spectrum Measurements Can Teach Us About the Epoch of Reionization
• A Per-Baseline, Delay-Spectrum Technique for Accessing the 21cm Cosmic Reionization Signature
• Four Fundamental Foreground Power Spectrum Shapes for 21 cm Cosmology Observations
• The Photo-Evaporation of Dwarf Galaxies During Reionization
• How accurately can 21 cm tomography constrain cosmology?
• Baryon acoustic oscillations from the complete SDSS-III Ly$\alpha$-quasar cross-correlation function at $z=2.4$
• Wouthuysen-Field coupling strength and application to high-redshift 21 cm radiation
• Resolving the Formation of Protogalaxies. III. Feedback from the First Stars
• A Method for Separating the Physics from the Astrophysics of High-Redshift 21cm Fluctuations
• 21CMMC: an MCMC analysis tool enabling astrophysical parameter studies of the cosmic 21 cm signal
• Population III star formation in a Lambda CDM universe, I: The effect of formation redshift and environment on protostellar accretion rate
• Confirmation of a Star Formation Bias in Type Ia Supernova Distances and its Effect on Measurement of the Hubble Constant
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: RSD measurement from the LOS-dependent power spectrum of DR12 BOSS galaxies
• The Epoch of Reionization Window: II. Statistical Methods for Foreground Wedge Reduction
• A Sensitivity and Array-Configuration Study for Measuring the Power Spectrum of 21cm Emission from Reionization
• The observable signature of late heating of the Universe during cosmic reionization
• A fresh look at linear cosmological constraints on a decaying dark matter component
• Opening the 21cm EoR Window: Measurements of Foreground Isolation with PAPER
• Impact of the Relative Motion between the Dark Matter and Baryons on the First Stars
• Constraining the unexplored period between reionization and the dark ages with observations of the global 21 cm signal
• The signature of the first stars in atomic hydrogen at redshift 20
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: BAO measurement from the LOS-dependent power spectrum of DR12 BOSS galaxies
• The Baryon Acoustic Oscillation Broadband and Broad-beam Array: Design Overview and Sensitivity Forecasts
• Line-Intensity Mapping: 2017 Status Report
• The Delay of Population III Star Formation by Supersonic Streaming Velocities
• The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: measurement of the growth rate of structure from the anisotropic correlation function between redshift 0.8 and 2.2
• Baryonic Acoustic Oscillations in 21cm Emission: A Probe of Dark Energy out to High Redshifts
• The 21-cm signature of the first stars during the Lyman-Werner feedback era
• The X-ray spectra of the first galaxies: 21cm signatures
• Rock 'n' Roll Solutions to the Hubble Tension
• Effect of Streaming Motion of Baryons Relative to Dark Matter on the Formation of the First Stars
• Suppression and Spatial Variation of Early Galaxies and Minihalos
• Large-scale BAO signatures of the smallest galaxies
• Light cone effect on the reionization 21-cm power spectrum
• Simulations of Early Baryonic Structure Formation with Stream Velocity: II. The Gas Fraction
• The impact of the supersonic baryon-dark matter velocity difference on the z~20 21cm background
• 21-cm Fluctuations from Charged Dark Matter
• The Influence of Streaming Velocities on the Formation of the First Stars
• Was Star-Formation Suppressed in High-Redshift Minihalos?
• Simulations of Early Baryonic Structure Formation with Stream Velocity: I. Halo Abundance
• 21CMMC with a 3D light-cone: the impact of the co-evolution approximation on the astrophysics of reionisation and cosmic dawn
• The formation of the first cosmic structures and the physics of the z~20 Universe
• UV Radiative Feedback During the Advanced Stages of Reionization
• High-redshift post-reionization cosmology with 21cm intensity mapping
• Complete history of the observable 21-cm signal from the first stars during the pre-reionization era
• A new light on 21 cm intensity fluctuations from the dark ages
• Probing the Epoch of Early Baryonic Infall Through 21cm Fluctuations
• Robust Velocity-induced Acoustic Oscillations at Cosmic Dawn
• The Impact of Foregrounds on Redshift Space Distortion Measurements With the Highly-Redshifted 21 cm Line
• Inflation and Early Dark Energy with a Stage II Hydrogen Intensity Mapping Experiment
• Can Early Dark Energy Explain EDGES?
• Formation of the first star clusters and massive star binaries by fragmentation of filamentary primordial gas clouds
• Separating out the Alcock-Paczynski Effect on 21cm Fluctuations
• Low-mass suppression of the satellite luminosity function due to the supersonic baryon--cold-dark-matter relative velocity
• Reconstructing the nature of the first cosmic sources from the anisotropic 21-cm signal
• Lyman-tomography of cosmic infrared background fluctuations with Euclid: probing emissions and baryonic acoustic oscillations at z>10

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• Data Analysis for Precision 21 cm Cosmology
• HERA Phase I Limits on the Cosmic 21-cm Signal: Constraints on Astrophysics and Cosmology During the Epoch of Reionization
• Concerns regarding the use of black hole shadows as standard rulers
• 21cmFAST v3: A Python-integrated C code forgenerating 3D realizations of the cosmic 21cm signal
• The Impact of the First Galaxies on Cosmic Dawn and Reionization
• Probing the Small-Scale Matter Power Spectrum with Large-Scale 21-cm Data
• A tale of two sites -- I: Inferring the properties of minihalo-hosted galaxies from current observations
• A User's Guide to Extracting Cosmological Information from Line-Intensity Maps
• Early-Universe-Physics Insensitive and Uncalibrated Cosmic Standards: Constraints on ${\Omega }_{\mathrm{m}}$ and Implications for the Hubble Tension
• The trouble beyond $H_0$ and the new cosmic triangles
• Robust Velocity-induced Acoustic Oscillations at Cosmic Dawn
• The Cosmic Expansion History from Line-Intensity Mapping
• Beware of commonly used approximations II: estimating systematic biases in the best-fit parameters
• Removing Astrophysics in 21 cm maps with Neural Networks
• Investigating the Hubble Constant Tension -- Two Numbers in the Standard Cosmological Model
• Small-scale clumping at recombination and the Hubble tension
• No-go guide for late-time solutions to the Hubble tension: Matter perturbations
• First Constraints on Small-Scale Non-Gaussianity from UV Galaxy Luminosity Functions
• Probing ultra-light axions with the 21-cm Signal during Cosmic Dawn
• ETHOS -- An Effective Theory of Structure Formation: Impact of Dark Acoustic Oscillations on Cosmic Dawn
• 21cmfish: Fisher-matrix framework for fast parameter forecasts from the cosmic 21-cm signal
• An Effective Bias Expansion for 21 cm Cosmology in Redshift Space
• Cosmic Variance of the 21-cm Global Signal
• 21cmFirstCLASS I. Cosmological tool for $\Lambda$CDM and beyond
• Measuring the cosmic expansion rate using 21-cm velocity acoustic oscillations
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• Probing Compensated Isocurvature with the 21-cm Signal during Cosmic Dawn
• The First Billion Years in Seconds: An Effective Model for the 21-cm Signal with Population III Stars
• Enlightening the dark ages with dark matter
• A galaxy-free phenomenological model for the 21-cm power spectrum during reionization
• Probing alternative cosmologies through the inverse distance ladder
• Uncorrelated Compensated Isocurvature Perturbations from kSZ Tomography
• Cosmological consequences of a scalar field with oscillating equation of state. II. Oscillating scaling and chaotic accelerating solutions
• Hubble tension as a window on the gravitation of the dark matter sector: Exploration of a family of models
• Perturbed recombination from inhomogeneous photon injection and application to accreting primordial black holes
• Antisymmetric cross-correlation of line-intensity maps as a probe of reionization
• Joint 21-cm and CMB Forecasts for Constraining Self-Interacting Massive Neutrinos
• A New Probe of the High-z BAO scale: BAO tomography With CMB $\times$ LIM-Nulling Convergence
• Cosmological consequences of a scalar field with oscillating equation of state. III. Unifying inflation with dark energy and small tensor-to-scalar ratio
• Probing light relics through cosmic dawn
• Magnetic Fields from Compensated Isocurvature Perturbations
• Cosmological perturbations with ultralight vector dark matter fields: numerical implementation in CLASS
• An Alcock-Paczynski Test on Reionization Bubbles for Cosmology
• Removal of interloper contamination to line-intensity maps using correlations with ancillary tracers of the large-scale structure
• Exploring delaying and heating effects on the 21-cm signature of fuzzy dark matter