Analyzing the 21-cm signal brightness temperature in the Universe with inhomogeneities
arXiv:2310.18757 · doi:10.1103/PhysRevD.110.043531
Abstract
We explore the 21-cm signal in our Universe containing inhomogeneous matter distribution at considerably large scales. Employing Buchert's averaging procedure in the context of a model of spacetime with multiple inhomogeneous domains, we evaluate the effect of our model parameters on the observable 21-cm signal brightness temperature. Our model parameters are constrained through the Markov Chain Monte Carlo method using the Union 2.1 supernova Ia observational data. We find that a significant dip in the brightness temperature compared to the CDM prediction could arise as an effect of the inhomogeneities present in the Universe.
arXiv comment18 pages, 8 figures, 2 appendices
References in corpus (64)
- The Hubble Space Telescope Cluster Supernova Survey: V. Improving the Dark Energy Constraints Above z>1 and Building an Early-Type-Hosted Supernova Sample
- 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
- 21-cm cosmology
- Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
- Measurements of the Hubble Constant: Tensions in Perspective
- On average properties of inhomogeneous fluids in general relativity I: dust cosmologies
- Reionization and Cosmology with 21 cm Fluctuations
- 21 Centimeter Fluctuations from Cosmic Gas at High Redshifts
- On average properties of inhomogeneous fluids in general relativity II: perfect fluid cosmologies
- 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
- Probing Beyond the Epoch of Hydrogen Reionization with 21 Centimeter Radiation
- Backreaction in late-time cosmology
- Dark energy from backreaction
- Current Dark Matter Annihilation Constraints from CMB and Low-Redshift Data
- Accelerated expansion from structure formation
- 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
- Probing the First Stars and Black Holes in the Early Universe with the Dark Ages Radio Explorer (DARE)
- 21cm Limits on Decaying Dark Matter and Primordial Black Holes
- Observing Neutral Hydrogen Above Redshift 6: The "Global" Perspective
- The spin temperature and 21cm brightness of the intergalactic medium in the pre-reionization era
- BIGHORNS - Broadband Instrument for Global HydrOgen ReioNisation Signal
- Cosmological Solutions in Macroscopic Gravity
- Light propagation in statistically homogeneous and isotropic dust universes
- Observational Challenges for the Standard FLRW Model
- Ultrafast effective multi-level atom method for primordial hydrogen recombination
- SARAS 2 constraints on global 21-cm signals from the Epoch of Reionization
- Light propagation in statistically homogeneous and isotropic universes with general matter content
- Multiscale cosmology and structure-emerging Dark Energy: A plausibility analysis
- Evaluating backreaction with the peak model of structure formation
- An exact quantification of backreaction in relativistic cosmology
- Absence of self-averaging and of homogeneity in the large scale galaxy distribution
- A Space-Based Observational Strategy for Characterizing the First Stars and Galaxies Using the Redshifted 21-cm Global Spectrum
- 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 relic neutrino decays with 21 cm cosmology
- Probing the effects of primordial black holes on 21-cm EDGES signal along with interacting dark energy and dark matter - baryon scattering
- Covariant coarse-graining of inhomogeneous dust flow in General Relativity
- PRATUSH experiment concept and design overview
- Towards statistically homogeneous and isotropic perfect fluid universes with cosmic backreaction
- Redshift drift in an inhomogeneous universe: averaging and the backreaction conjecture
- Bounds on abundance of primordial black hole and dark matter from EDGES 21-cm signal
- 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
- Cosmic backreaction and the mean redshift drift from symbolic regression
- Machine learning cosmic backreaction and its effects on observations
- 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
- Effect of inhomogeneities on the propagation of gravitational waves from binaries of compact objects
- Future evolution in a backreaction model and the analogous scalar field cosmology
- Effect of cosmic backreaction on the future evolution of an accelerating universe
- Viscous attenuation of gravitational waves propagating through an inhomogeneous background
- Future deceleration due to backreaction in a Universe with multiple inhomogeneous domains