Dr Peter Sims

Biography

After completing his PhD at the University of Cambridge, Dr Sims held postdoctoral researcher, fellowship, and research scientist positions at Brown University, McGill University, and Arizona State University in North America. In 2025, he was appointed as a Senior Research Associate at the Cavendish Laboratory, University of Cambridge, UK. Dr Sims is actively involved in the SKA, REACH, HERA, and EDGES projects, which focus on the detection and study of the redshifted 21-cm line from the infant Universe during the Dark Ages, Cosmic Dawn, and Epoch of Reionization.

Research

Dr Sims is a 21-cm cosmologist. His research interests include:

• Observational and theoretical radio astronomy and cosmology.
• Development and application of Bayesian inference, validation, and information-theoretic techniques for high-precision measurements of redshifted 21-cm emission from neutral hydrogen in the early Universe.
• Multi-wavelength analyses of the Universe’s first billion years, particularly through machine learning–accelerated Bayesian inference to optimally extract astrophysical and cosmological information. This involves the joint analysis of high-redshift probes, including sky-averaged and fluctuating 21-cm emission, high-redshift quasar spectra, galaxy statistics, and measurements of the Cosmic Microwave Background.