The Cosmic Microwave Background Optical Depth Constrains the Duration of Reionization

The Cosmic Microwave Background Optical Depth Constrains the Duration of Reionization

Recently, it was pointed out that invoking a large value of the cosmic microwave background (CMB) optical depth, τ _CMB  = 0.09, could help resolve tensions between Dark Energy Survey Instrument DR2 baryon acoustic oscillation data and the CMB. This is larger than the value of τ _CMB  = 0.058 measur...

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Bibliographic Details
Main Authors: Christopher Cain, Alexander Van Engelen, Kevin S. Croker, Darby Kramer, Anson D’Aloisio, Garett Lopez
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Series:The Astrophysical Journal Letters
Subjects:
Reionization
Cosmic microwave background radiation
Observational cosmology
Online Access:https://doi.org/10.3847/2041-8213/ade141
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