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First measurement of the cross-correlation of CMB lensing and galaxy lensing

Hand, N, Leauthaud, A, Das, S, Sherwin, BD, Addison, GE, Bond, JR, Calabrese, E, Charbonnier, A, Devlin, MJ, Dunkley, J, Erben, T, Hajian, A, Halpern, M, Harnois-Déraps, J, Heymans, C, Hildebrandt, H, Hincks, AD, Kneib, J-P, Kosowsky, A, Makler, M , Miller, L, Moodley, K, Moraes, B, Niemack, MD, Page, LA, Partridge, B, Sehgal, N, Shan, H, Sievers, JL, Spergel, DN, Staggs, ST, Switzer, ER, Taylor, JE, Van Waerbeke, L, Welker, C and Wollack, EJ (2015) First measurement of the cross-correlation of CMB lensing and galaxy lensing. Physical Review D, 91 (6). ISSN 1550-7998

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Abstract

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 4.2σ, 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.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical and Space Sciences, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, 0206 Quantum Physics
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: American Physical Society (APS)
Date Deposited: 24 Jul 2020 11:23
Last Modified: 24 Jul 2020 11:30
DOI or Identification number: 10.1103/physrevd.91.062001
URI: http://researchonline.ljmu.ac.uk/id/eprint/13371

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