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The Cosmic Radio Background – Foregrounds to the Epoch of Reionization

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If you have a question about this talk, please contact David Titterington.

Study of the Epoch of Reionization (EoR) and the first luminous sources is a field at the forefront of observational cosmology. Over the coming decade the first experiments to study this missing chapter in the early history of the universe will come online and begin making observations using redshifted 21 cm hyperfine line emission from the neutral hydrogen that pervaded the IGM during this epoch. Detection of this emission on top of foregrounds five orders of magnitude greater in intensity will be a significant challenge in requiring precise instrumental calibration, and accurate characterisation and subtraction of the foreground sources. This talk will describe aspects of the ongoing effort to model multiple components of the EoR foreground and the related task of uncovering the origins of the significant excess emission found by the ARCADE2 experiment.

This talk is part of the Cavendish Astrophysics Seminars series.

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