The Atacama Cosmology Telescope: Weighing Distant Clusters with the Most Ancient Light
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Abstract
We use gravitational lensing of the cosmic microwave background (CMB) to
measure the mass of the most distant blindly-selected sample of galaxy clusters
on which a lensing measurement has been performed to date. In CMB data from the
the Atacama Cosmology Telescope (ACT) and the Planck satellite, we detect the
stacked lensing effect from 677 near-infrared-selected galaxy clusters from the
Massive and Distant Clusters of WISE Survey (MaDCoWS), which have a mean
redshift of $ \langle z \rangle = 1.08$. There are no current optical weak
lensing measurements of clusters that match the distance and average mass of
this sample. We detect the lensing signal with a significance of
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2041-8213
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Science and Technology Facilities Council (ST/N004019/1)