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Unifying foreground emission characterisation across the radio and microwave regimes: implications for cosmology

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If you have a question about this talk, please contact Charles Walker .

The next generation of Cosmic Microwave Background experiments are poised to probe the inflationary period of the Universe through the measurement of primordial B-modes, whilst 21cm experiments are observing the reionization history of the early Universe and formation of Large Scale Structure through the mapping of neutral hydrogen. These two complementary fields span the radio to microwave frequency regimes and share a pivotal data reduction task: foreground component separation. In this talk I will discuss the latest understanding around diffuse and compact foreground emissions from MHz to GHz frequencies and how the recent increase in empirical data coupled with technical advances in methodologies (e.g. kernel processes, machine learning and sparsity) are taking us closer to a unified model of foreground emissions that can be utilised by multiple communities within the field of cosmology.

This talk is part of the Hills Coffee Talks series.

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