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Subir Sarkar

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Emeritus Professor, Department of Physics, University of Oxford

Artist’s impression of a Type Ia supernova. Credit: ESA/ATG medialab/C. Carreau

July 21, 2026

Does dark energy really exist? Our work identifies cracks in the foundations of today’s cosmological model

Subir Sarkar, University of Oxford

The expansion of the universe may not in fact be accelerating, calling dark energy into question.

This image from the NASA/ESA/CSA James Webb Space Telescope revisits one of the most iconic regions of the sky, the Hubble Ultra Deep Field. ESA/Webb, NASA & CSA, G. Östlin, P. G. Perez-Gonzalez, J. Melinder, the JADES Collaboration, the MIDIS collaboration, M. Zamani (ESA/Webb)

December 22, 2025

The universe may be lopsided – new research

Subir Sarkar, University of Oxford

A mysterious anomaly challenges the most widely accepted vision of how the universe works.

The Milky Way, as seen with neutrino particles. IceCube Collaboration / US National Science Foundation (Lily Le and Shawn Johnson) / ESO (S. Brunier)

June 30, 2023

First ever view of the Milky Way seen through the lens of neutrino particles

Subir Sarkar, University of Oxford

An observatory called IceCube was used to produce a view of our galaxy in particles rather than light.

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Joined June 30, 2023