21CMMC with a 3D light-cone: the impact of the co-evolution approximation on the astrophysics of reionization and cosmic dawn

@article{Greig201821CMMCWA,
  title={21CMMC with a 3D light-cone: the impact of the co-evolution approximation on the astrophysics of reionization and cosmic dawn},
  author={Bradley Greig and Andrei Mesinger},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2018},
  volume={477},
  pages={3217-3229}
}
  • B. Greig, A. Mesinger
  • Published 5 January 2018
  • Physics
  • Monthly Notices of the Royal Astronomical Society
We extend 21CMMC, a Monte Carlo Markov Chain sampler of 3D reionisation simulations, to perform parameter estimation directly on 3D light-cones of the cosmic 21cm signal. This brings theoretical analysis closer to the tomographic 21-cm observations achievable with next generation interferometers like HERA and the SKA. Parameter recovery can therefore account for modes which evolve with redshift/frequency. Additionally, simulated data can be more easily corrupted to resemble real data. Using the… 

Figures and Tables from this paper

The impact of non-Gaussianity on the Epoch of Reionization parameter forecast using 21-cm power-spectrum measurements

Measurements of the Epoch of Reionization (EoR) 21-cm signal hold the potential to constrain models of reionization. In this paper we consider a reionization model with three astrophysical parameters

Simulation-based Inference of Reionization Parameters from 3D Tomographic 21 cm Light-cone Images

This work adopts a trained 3D convolutional neural network to compress the 3D image data into informative summaries (DELFI-3D CNN) and shows that this method recovers accurate posterior distributions for the reionization parameters.

The Impact of Realistic Foreground and Instrument Models on 21 cm Epoch of Reionization Experiments

Predictions for the ability of 21 cm interferometric experiments to discriminate Epoch of Reionization (EoR) signal models are typically limited by the simplicity of data models, whereby foreground

Emulating the global 21-cm signal from Cosmic Dawn and Reionization

The 21-cm signal of neutral hydrogen is a sensitive probe of the Epoch of Reionization (EoR), Cosmic Dawn, and the Dark Ages. Currently, operating radio telescopes have ushered in a data-driven era

Inferring the properties of the sources of reionization using the morphological spectra of the ionized regions

High-redshift 21-cm observations will provide crucial insights into the physical processes of the Epoch of Reionization. Next-generation interferometers such as the Square Kilometer Array will have

Interpreting LOFAR 21-cm signal upper limits at z ≈ 9.1 in the context of high-z galaxy and reionization observations

Using the latest upper limits on the 21-cm power spectrum at $z\approx9.1$ from the Low Frequency Array (LOFAR), we explore regions of parameter space which are inconsistent with the data. We use

Reionisation & Cosmic Dawn Astrophysics from the Square Kilometre Array: Impact of Observing Strategies

Interferometry of the cosmic 21-cm signal is set to revolutionise our understanding of the Epoch of Reionisation (EoR) and the Cosmic Dawn (CD). The culmination of ongoing efforts will be the

Standard Ruler at Cosmic Dawn.

It is found 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.

Properties of reionization-era galaxies from JWST luminosity functions and 21-cm interferometry

Upcoming observations will probe the first billion years of our Universe in unprecedented detail. Foremost among these are 21-cm interferometry with the Hydrogen Epoch of Reionization Arrays (HERA)

Large-scale 21 cm signal predictions at cosmic dawn with calibrated subgrid galaxy formation

The process of heating and reionization of the Universe at high redshifts links small-scale structures/galaxy formation and large-scale intergalactic medium (IGM) properties. Even if the first one

References

SHOWING 1-10 OF 85 REFERENCES

Simultaneously constraining the astrophysics of reionisation and the epoch of heating with 21CMMC

Abstract We extend our MCMC sampler of 3D EoR simulations, 21CMMC, to perform parameter estimation directly on light-cones of the cosmic 21cm signal. This brings theoretical analysis one step closer

Light cone effect on the reionization 21-cm signal – II. Evolution, anisotropies and observational implications

Measurements of the H I 21-cm power spectra from the reionization epoch will be influenced by the evolution of the signal along the line-of-sight direction of any observed volume. We use numerical as

21 cm signal from cosmic dawn - II. Imprints of the light-cone effects

Details of various unknown physical processes during the cosmic dawn and the epoch of reionization can be extracted from observations of the redshifted 21-cm signal. These observations, however, will

Light-cone effect on the reionization 21-cm power spectrum

Observations of redshifted 21-cm radiation from neutral hydrogen during the epoch of reionization are considered to constitute the most promising tool to probe that epoch. One of the major goals of

REIONIZATION ON LARGE SCALES. IV. PREDICTIONS FOR THE 21 cm SIGNAL INCORPORATING THE LIGHT CONE EFFECT

We present predictions for the 21 cm brightness temperature power spectrum during the Epoch of Reionization (EoR). We discuss the implications of the “light cone” effect, which incorporates evolution

Towards simulating and quantifying the light-cone EoR 21-cm signal

The light-cone (LC) effect causes the Epoch of Reionization (EoR) 21-cm signal $$T_{\rm b} (\hat{\boldsymbol {n}}, \nu )$$ to evolve significantly along the line-of-sight (LoS) direction ν. In the

Light-cone anisotropy in the 21 cm signal from the epoch of reionization

Using a suite of detailed numerical simulations, we estimate the level of anisotropy generated by the time evolution along the light cone of the 21 cm signal from the epoch of reionization. Our

Epoch of reionization 21 cm forecasting from MCMC-constrained semi-numerical models

The recent low value of Planck (2016) integrated optical depth to Thomson scattering suggests that the reionization occurred fairly suddenly, disfavoring extended reionization scenarios. This will

Redshift-space distortion of the 21-cm background from the epoch of reionization – I. Methodology re-examined

The peculiar velocity of the intergalactic gas responsible for the cosmic 21cm background from the epoch of reionization and beyond introduces an anisotropy in the three-dimensional power spectrum of

Exploring the evolution of reionization using a wavelet transform and the light cone effect

The Cosmic Dawn and Epoch of Reionisation, during which collapsed structures produce the first ionising photons and proceed to reionise the intergalactic medium, span a large range in redshift
...