English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We present cosmological constraints from a gravitational lensing mass mapcovering 9400 sq. deg. reconstructed from CMB measurements made by the AtacamaCosmology Telescope (ACT) from 2017 to 2021. In combination with BAOmeasurements (from SDSS and 6dF), we obtain the amplitude of matterfluctuations $\sigma_8 = 0.819 \pm 0.015$ at 1.8% precision,$S_8\equiv\sigma_8({\Omega_{\rm m}}/0.3)^{0.5}=0.840\pm0.028$ and the Hubbleconstant $H_0= (68.3 \pm 1.1)\, \text{km}\,\text{s}^{-1}\,\text{Mpc}^{-1}$ at1.6% precision. A joint constraint with CMB lensing measured by the Plancksatellite yields even more precise values: $\sigma_8 = 0.812 \pm 0.013$,$S_8\equiv\sigma_8({\Omega_{\rm m}}/0.3)^{0.5}=0.831\pm0.023$ and $H_0= (68.1\pm 1.0)\, \text{km}\,\text{s}^{-1}\,\text{Mpc}^{-1}$. These measurements agreewell with $\Lambda$CDM-model extrapolations from the CMB anisotropies measuredby Planck. To compare these constraints to those from the KiDS, DES, and HSCgalaxy surveys, we revisit those data sets with a uniform set of assumptions,and find $S_8$ from all three surveys are lower than that from ACT+Plancklensing by varying levels ranging from 1.7-2.1$\sigma$. These results motivatefurther measurements and comparison, not just between the CMB anisotropies andgalaxy lensing, but also between CMB lensing probing $z\sim 0.5-5$ onmostly-linear scales and galaxy lensing at $z\sim 0.5$ on smaller scales. Wecombine our CMB lensing measurements with CMB anisotropies to constrainextensions of $\Lambda$CDM, limiting the sum of the neutrino masses to $\summ_{\nu} < 0.12$ eV (95% c.l.), for example. Our results provide independentconfirmation that the universe is spatially flat, conforms with generalrelativity, and is described remarkably well by the $\Lambda$CDM model, whilepaving a promising path for neutrino physics with gravitational lensing fromupcoming ground-based CMB surveys.

The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters