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Showing 1 to 7 of 7 for “"Epoch of Reionisation"”.
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Interferometric Methods
… specified to have sensitivities at the level of $\mu$Jy's. The SKA-Low instrument will consist of a huge number of dipoles antennas in Australia which is pushing the bounds of current FX correlator technology with $\mathbb{O}(n^2)$ scaling, where $n$ is the number of antennas. The design …
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Spectroscopic studies of star-forming galaxies and the intergalactic medium in the early Universe
… us to perform detailed spectroscopic analyses of distant galaxies well into the Epoch of Reionisation (EoR). This crucial phase transition witnessed baryonic matter, mostly in the form of cold, neutral hydrogen gas, being chemically enriched, ionised, and heated as a result of the formation of …
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EXCALIBRATE Bayesian calibration for data-intensive astrophysical experimentation
The detection of minute radio-frequency signals from the primordial Universe are thought to contain fundamental information on the evolution of the first luminous sources. Such breakthroughs however are hindered by the unprecedented levels of sensitivity and calibration needed to confidently …
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Data Analysis in Global 21cm Experiments: Physically Motivated Bayesian Modelling Techniques
… gas is used to probe cosmology and astrophysics of early epochs of the universe. In particular, this process is one of the most promising methods of measuring the Cosmic Dawn, when the first stars formed, and the Epoch of Reionisation, making it a key objective of modern radio cosmology. This …
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Investigating the Epoch of Cosmic Reionisation with Radio Interferometers
The Epoch of Reionisation (EoR) marks the cosmic period during which the neutral hydrogen (H I) that pervaded the Universe transitioned to an almost entirely ionised state. This process was driven by the energetic photons emitted by the first luminous sources. As such, the EoR encodes crucial …
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New insights into primeval galaxies in the era of JWST
The properties of galaxies that existed in the early Universe hold the key to understanding not only their formation and evolution but also the broader reionisation process. While the Hubble Space Telescope (HST) was able to identify a small sample of candidate z>7 galaxies, the James Webb Space …
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Constraining the UV background with the proximity effect
After the epoch of reionisation the intergalactic medium (IGM) is kept at a high photoionisation level by the cosmic UV background radiation field. Primarily composed of the integrated contribution of quasars and young star forming galaxies, its intensity is subject to spatial and temporal …