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Dr Qin Yuxiang (University of Melbourne)05/10/2021, 15:10
The cosmic 21-cm signal observed by the Square Kilometre Array (SKA) will open a new window to the early Universe. 21-cm fluctuations encode the properties of the unseen first galaxies as well as physical cosmology. I will showcase our fully Bayesian inference framework, capable of forward-modeling 4D realizations of cosmic 21-cm lightcones. I will demonstrate how this framework was...
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Marta Spinelli (Istituto Nazionale di Astrofisica (INAF))05/10/2021, 15:30
Total-power radiometry with individual meter-wave antennas is a potentially effective way to study the Cosmic Dawn ($z\sim20$) through measurement of the sky brightness arising from the $21$~cm transition of neutral hydrogen, provided this can be disentangled from much stronger Galactic and extra-galactic foregrounds. In the process, measured spectra of integrated sky brightness temperature...
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Ainulnabilah Nasirudin (Scuola Normale Superiore)05/10/2021, 16:20
Detection of signals from the Epoch of Reionization (EoR) is one of the new frontiers in observational cosmology. However, predictions of the ability of 21-cm experiments to discriminate EoR signal models are typically limited by the simplicity of data models, in which the effects of foregrounds and characteristics of the instrument are often neglected. Current experiments have shown that...
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David Prelogovic05/10/2021, 16:40
With the Square Kilometre Array (SKA), through the cosmic 21cm signal, we will soon have images of the first billion years of our Universe. Inferring the (unknown) UV and X-ray properties of the first galaxies from the highly non-Gaussian patterns of such images is a challenging problem where there is no obvious choice of a summary statistic (image compression). For this purpose, neural...
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