PRL: Resolving cosmological tensions with reionization
April 23, 2025·
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1 min read
Gerrit S. Farren
Addressing Tensions in $\Lambda$CDM Cosmology by an Increase in the Optical Depth to Reionization is published in Physical Review Letters (2504.16932). Joint first-authored with Noah Sailer, with Simone Ferraro and Martin White, the paper shows that a moderate $\tau$ increase — within data — can absorb recent $\Lambda$CDM tensions without invoking new physics.
More context on the paper page itself: Addressing Tensions in $\Lambda$CDM by Increasing $\tau$.
Authors
Gerrit S. Farren
(he/him)
Cosmologist & Data Scientist | Mapping the Universe at Scale
Cosmologist working on multi-probe analyses of the largest cosmological datasets. I build large scale analysis pipelines that combine Bayesian inference, distributed/HPC computing, and careful systematics control to turn modern survey data into robust physical insight.