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Measuring H0 and dark energy with DESI

Aug 25, 2025, 10:00 a.m.
30m
PI/2-292 - Time Room (Perimeter Institute for Theoretical Physics)

PI/2-292 - Time Room

Perimeter Institute for Theoretical Physics

60
Conference Talk

Speaker

Will Percival (University of Waterloo)

Description

The Dark Energy Spectroscopic Instrument (DESI) is the first of a new generation of Dark Energy experiments and probes evolution in the universe using galaxy clustering. Within the galaxy clustering signal, the projected location of the Baryon Acoustic Oscillations (BAO) acts as a standard ruler to map cosmic evolution. I will present the latest BAO results from the DESI Data Release 2 (DR2) sample, which contains 3 years of data, and their impact on our understanding of dark energy and neutrino masses. Finally, I will consider how the amplitude of the BAO signal can help us measure the Hubble constant, potentially helping to solve the Hubble tension.

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