Primordial Gravitational Waves 2024
Deng Wang (Instituto de Fisica Corpuscular, CSIC-Universitat de, Valencia)
TL;DR
This paper provides the most stringent constraints to date on primordial gravitational waves by analyzing cosmic microwave background data from multiple observatories and their combinations, shedding light on early universe physics.
Contribution
It offers new, tighter bounds on primordial gravitational waves using combined CMB datasets, advancing understanding of early universe conditions.
Findings
Strongest constraints on primordial gravitational waves to date
Combined data from Planck, ACT, SPT, BK18, and DESI used
Implications for models of the early universe
Abstract
Primordial gravitational waves have crucial implications for the origin of the universe and fundamental physics. Using currently available cosmic microwave background data from Planck, ACT and SPT separately or their combinations with BK18 B-mode polarization and DESI observations, we give the strongest constraints on primordial gravitational waves so far.
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Taxonomy
TopicsGeophysics and Gravity Measurements · Cosmology and Gravitation Theories