Publication Date:
2019-07-13
Description:
We measure the cross-correlation of cosmic microwave background (CMB) lensing convergence maps derived from Atacama Cosmology Telescope data with galaxy lensing convergence maps as measured by the Canada-France-Hawaii Telescope Stripe 82 Survey. The CMB-galaxy lensing cross power spectrum is measured for the first time with a significance of 4.2, which corresponds to a 12% constraint on the amplitude of density fluctuations at redshifts 0.9. With upcoming improved lensing data, this novel type of measurement will become a powerful cosmological probe, providing a precise measurement of the mass distribution at intermediate redshifts and serving as a calibrator for systematic biases in weak lensing measurements.
Keywords:
Astrophysics
Type:
GSFC-E-DAA-TN22729
,
Physical Review D (ISSN 2470-0010) (e-ISSN 2470-0029); 91; 6; 062001
Format:
text
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