Constraining the Hubble parameter with the 21 cm brightness temperature signal in a universe with inhomogeneities
arXiv:2505.22219 · doi:10.1103/w1wp-tqz2
Abstract
We consider the 21\,cm brightness temperature as a probe of the Hubble tension in the framework of an inhomogeneous cosmological model. Employing Buchert's averaging formalism to study the effect of inhomogeneities on the background evolution, we consider scaling laws for the backreaction and curvature consistent with structure formation simulations. We calibrate the effective matter density using MCMC analysis using Union 2.1 Supernova Ia data. Our results show that a higher Hubble constant (\,km/s/Mpc) leads to a shallower absorption feature in the brightness temperature versus redshift curve. On the other hand, a lower value (\,km/s/Mpc) produces a remarkable dip in the brightness temperature . Such a substantial difference is absent in the standard CDM model. Our findings indicate that inhomogeneities could significantly affect the 21\,cm signal, and may shed further light on the different measurements of the Hubble constant.
14 pages , 4 figures
References in corpus (99)
- Planck 2015 results. XIII. Cosmological parameters
- A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
- The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
- In the Beginning: The First Sources of Light and the Reionization of the Universe
- The Pantheon+ Analysis: Cosmological Constraints
- An absorption profile centred at 78 megahertz in the sky-averaged spectrum
- 21-cm cosmology
- 21-cm Tomography of the Intergalactic Medium at High Redshift
- Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
- A population of red candidate massive galaxies ~600 Myr after the Big Bang
- Measurements of the Hubble Constant: Tensions in Perspective
- On average properties of inhomogeneous fluids in general relativity I: dust cosmologies
- 21 Centimeter Fluctuations from Cosmic Gas at High Redshifts
- Evolution of the cosmic web
- On the Hubble constant tension in the SNe Ia Pantheon sample
- Tracing the cosmic web
- Stress Testing CDM with High-redshift Galaxy Candidates
- The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
- On average properties of inhomogeneous fluids in general relativity II: perfect fluid cosmologies
- A Dynamical Classification of the Cosmic Web
- Multiscale Phenomenology of the Cosmic Web
- Wouthuysen-Field coupling strength and application to high-redshift 21 cm radiation
- On cosmic acceleration without dark energy
- HyRec: A fast and highly accurate primordial hydrogen and helium recombination code
- Is the Observable Universe Consistent with the Cosmological Principle?
- The Spin-Kinetic Temperature Coupling and the Heating Rate due to Lyman Alpha Scattering before Reionization: Predictions for 21cm Emission and Absorption
- Cosmic Voids in Sloan Digital Sky Survey Data Release 7
- Probing Beyond the Epoch of Hydrogen Reionization with 21 Centimeter Radiation
- Enhanced global signal of neutral hydrogen due to excess radiation at cosmic dawn
- On the evolution of the Hubble constant with the SNe Ia Pantheon Sample and Baryon Acoustic Oscillations: a feasibility study for GRB-cosmology in 2030
- Backreaction in late-time cosmology
- Cosmic clocks, cosmic variance and cosmic averages
- Modeling the Radio Background from the First Black Holes at Cosmic Dawn: Implications for the 21 cm Absorption Amplitude
- Dark energy from backreaction
- Current Dark Matter Annihilation Constraints from CMB and Low-Redshift Data
- Signature of Excess Radio Background in the 21-cm Global Signal and Power Spectrum
- Exact solution to the averaging problem in cosmology
- A public void catalog from the SDSS DR7 Galaxy Redshift Surveys based on the watershed transform
- Is there proof that backreaction of inhomogeneities is irrelevant in cosmology?
- Heating of Baryons due to Scattering with Dark Matter During the Dark Ages
- Light-cone averaging in cosmology: formalism and applications
- 21cm Limits on Decaying Dark Matter and Primordial Black Holes
- Inhomogeneity and the foundations of concordance cosmology
- Observing Neutral Hydrogen Above Redshift 6: The "Global" Perspective
- Probing the First Stars and Black Holes in the Early Universe with the Dark Ages Radio Explorer (DARE)
- The spin temperature and 21cm brightness of the intergalactic medium in the pre-reionization era
- Cosmological Solutions in Macroscopic Gravity
- Light propagation in statistically homogeneous and isotropic dust universes
- Observational Challenges for the Standard FLRW Model
- The Rise of the First Stars: Supersonic Streaming, Radiative Feedback, and 21-cm Cosmology
- Ultrafast effective multi-level atom method for primordial hydrogen recombination
- Constraining primordial black holes as dark matter using the global 21-cm signal with X-ray heating and excess radio background
- Light propagation in statistically homogeneous and isotropic universes with general matter content
- Multiscale cosmology and structure-emerging Dark Energy: A plausibility analysis
- On the onset of cosmological backreaction
- The Scattering of Lyman-series Photons in the Intergalactic Medium
- A new measurement of the Hubble constant and matter content of the Universe using extragalactic background light -ray attenuation
- Evaluating backreaction with the peak model of structure formation
- Populations of filaments from the distribution of galaxies in numerical simulations
- An exact quantification of backreaction in relativistic cosmology
- Absence of self-averaging and of homogeneity in the large scale galaxy distribution
- Heating and cooling of the intergalactic medium by resonance photons
- The Radio Scream from Black Holes at Cosmic Dawn: A Semi-Analytic Model for the Impact of Radio Loud Black-Holes on the 21 cm Global Signal
- Lyman- coupling and heating at Cosmic Dawn
- Direct Minkowski Functional analysis of large redshift surveys: a new high--speed code tested on the luminous red galaxy Sloan Digital Sky Survey-DR7 catalogue
- Another look at redshift drift and the backreaction conjecture
- A Giant Arc on the Sky
- Observations in statistically homogeneous, locally inhomogeneous cosmological toy-models without FLRW backgrounds
- Searching for signals of inhomogeneity using multiple probes of the cosmic expansion rate H(z)
- Probing the effects of primordial black holes on 21-cm EDGES signal along with interacting dark energy and dark matter - baryon scattering
- Impact of Ly heating on the global 21-cm signal from the Cosmic Dawn
- Covariant coarse-graining of inhomogeneous dust flow in General Relativity
- Energy transfer by the scattering of resonant photons
- Bounds on abundance of primordial black hole and dark matter from EDGES 21-cm signal
- Towards statistically homogeneous and isotropic perfect fluid universes with cosmic backreaction
- Evolution of superclusters in the cosmic web
- Redshift drift in an inhomogeneous universe: averaging and the backreaction conjecture
- Probing Interacting Dark Energy and Scattering of Baryons with Dark Matter in Light of EDGES 21cm Signal
- Constraints on primordial black holes and curvature perturbations from the global 21cm signal
- Extended percolation analysis of the cosmic web
- Testing CCC+TL Cosmology with Observed BAO Features
- Cosmic backreaction and the mean redshift drift from symbolic regression
- Machine learning cosmic backreaction and its effects on observations
- Varying Coupling Constants and Their Interdependence
- On the relationship between mean observations, spatial averages and the Dyer-Roeder approximation in Einstein-Straus models
- Inhomogeneity implies Accelerated Expansion
- Future deceleration due to cosmic backreaction in presence of the event horizon
- Exploring multimessenger signals from heavy dark matter decay with EDGES 21-cm result and IceCube
- Quantifying effects of inhomogeneities and curvature on gravitational wave standard siren measurements of
- Global 21-cm brightness temperature in viscous dark energy models
- Future evolution in a backreaction model and the analogous scalar field cosmology
- Evolution of superclusters and supercluster cocoons in various cosmologies
- Effect of inhomogeneities on the propagation of gravitational waves from binaries of compact objects
- Effect of cosmic backreaction on the future evolution of an accelerating universe
- The impact of Lyman- emission line heating and cooling on the cosmic dawn 21-cm signal
- Future deceleration due to backreaction in a Universe with multiple inhomogeneous domains
- Viscous attenuation of gravitational waves propagating through an inhomogeneous background
- DESIVAST: A Catalog of Low-Redshift Voids using Data from the DESI DR1 Bright Galaxy Survey
- Analyzing the 21-cm signal brightness temperature in the Universe with inhomogeneities