March 3, 2026Open Access

Cosmological constraints from ACT Data Release 6

Key Points

Provides detailed maps of cosmic microwave background temperature and polarization across 40% of the sky, enhancing our understanding of cosmology.
ACT's sixth data release covers observations from 2017 to 2022, integrating extensive datasets to refine cosmological insights.
Analysis demonstrates important constraints on fundamental assumptions of the standard cosmological model and particle physics.
Findings may influence future cosmological theories, highlighting the significance of high-resolution cosmic maps.

Abstract

In March 2025, the Atacama Cosmology Telescope (ACT) released its last cosmological analysis, along with a new cosmic microwave background (CMB) dataset. The sixth data release (DR6), including data collected from 2017 to 2022, covers 40% of the sky at arcminute resolution providing the most precise maps of CMB temperature and polarization over a large sky area. Here I give an overview of the ACT DR6 analysis and describe its constraints on fundamental assumptions of the standard cosmological model and extensions to it, including constraints on particle physics.

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Cite This Study

Adrien La Posta (Fri,) studied this question.

synapsesocial.com/papers/69a767d2badf0bb9e87e2800 https://doi.org/https://doi.org/10.22323/1.485.0094

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