Evidence for the Cross-correlation between Cosmic Microwave Background Polarization Lensing from POLARBEAR and Cosmic Shear from Subaru Hyper Suprime-Cam
Creators: name: Namikawa, Toshiya
name: Chinone, Yuji
name: Miyatake, Hironao
name: Oguri, Masamune
name: Takahashi, Ryuichi
name: Kusaka, Akito
name: Katayama, Nobuhiko
name: Adachi, Shunsuke
name: Aguilar, Mario
name: Aihara, Hiroaki
name: Ali, Aamir
name: Armstrong, Robert
name: Arnold, Kam
name: Baccigalupi, Carlo
name: Barron, Darcy
name: Beck, Dominic
name: Beckman, Shawn
name: Bianchini, Federico
name: Boettger, David
name: Borrill, Julian
name: Cheung, Kolen
name: Corbett, Lance
name: Crowley, Kevin T.
name: Bouhargani, Hamza El
name: Elleflot, Tucker
name: Errard, Josquin
name: Fabbian, Giulio
name: Feng, Chang
name: Galitzki, Nicholas
name: Goeckner-Wald, Neil
name: Groh, John
name: Hamada, Takaho
name: Hasegawa, Masaya
name: Hazumi, Masashi
name: Hill, Charles
name: Howe, Logan
name: Jeong, Oliver
name: Kaneko, Daisuke
name: Keating, Brian
name: Lee, Adrian T.
name: Leon, David
name: Linder, Eric
name: Lowry, Lindsay Ng
name: Mangu, Aashrita
name: Matsuda, Frederick
name: Minami, Yuto
name: Miyazaki, Satoshi
name: Murayama, Hitoshi
name: Navaroli, Martin
name: Nishino, Haruki
name: Nishizawa, Atsushi J.
name: Pham, Anh Thi Phuong
name: Poletti, Davide
name: Puglisi, Giuseppe
name: Reichardt, Christian L.
name: Sherwin, Blake D.
name: Silva-Feaver, Maximiliano
name: Siritanasak, Praween
name: Speagle, Joshua S.
name: Stompor, Radek
name: Suzuki, Aritoki
name: Tait, Philip J.
name: Tajima, Osamu
name: Takada, Masahiro
name: Takakura, Satoru
name: Takatori, Sayuri
name: Tanabe, Daiki
name: Tanaka, Masayuki
name: Teply, Grant P.
name: Tsai, Calvin
name: Verges, Clara
name: Westbrook, Ben
name: Zhou, Yuyang
name: Collaboration, The POLARBEAR
name: Collaboration, the Subaru HSC SSP
Publisher: name: arXiv
Year: 2019
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present the first measurement of cross-correlation between the lensing potential, reconstructed from cosmic microwave background (CMB) {\it polarization} data, and the cosmic shear field from galaxy shapes. This measurement is made using data from the POLARBEAR CMB experiment and the Subaru Hyper Suprime-Cam (HSC) survey. By analyzing an 11~deg$^2$ overlapping region, we reject the null hypothesis at 3.5$σ$\ and constrain the amplitude of the {\bf cross-spectrum} to $\widehat{A}_{\rm lens}=1.70\pm 0.48$, where $\widehat{A}_{\rm lens}$ is the amplitude normalized with respect to the Planck~2018{} prediction, based on the flat $Λ$ cold dark matter cosmology. The first measurement of this {\bf cross-spectrum} without relying on CMB temperature measurements is possible due to the deep POLARBEAR map with a noise level of ${\sim}$6\,$μ$K-arcmin, as well as the deep HSC data with a high galaxy number density of $n_g=23\,{\rm arcmin^{-2}}$. We present a detailed study of the systematics budget to show that residual systematics in our results are negligibly small, which demonstrates the future potential of this cross-correlation technique.
description: 16 pages, 5 figures, Accepted for publication in ApJ