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arXiv · 1904.02116

Evidence for the Cross-correlation between Cosmic Microwave Background Polarization Lensing from POLARBEAR and Cosmic Shear from Subaru Hyper Suprime-Cam

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

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$\sigma$\ 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 $\Lambda$ 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}$6\,$\mu$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.

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Toshiya Namikawa, Yuji Chinone, Hironao Miyatake, Masamune Oguri, Ryuichi Takahashi, Akito Kusaka, Nobuhiko Katayama, Shunsuke Adachi, Mario Aguilar, Hiroaki Aihara, Aamir Ali, Robert Armstrong, Kam Arnold, Carlo Baccigalupi, Darcy Barron, Dominic Beck, Shawn Beckman, Federico Bianchini, David Boettger, Julian Borrill, Kolen Cheung, Lance Corbett, Kevin T. Crowley, Hamza El Bouhargani, Tucker Elleflot, Josquin Errard, Giulio Fabbian, Chang Feng, Nicholas Galitzki, Neil Goeckner-Wald, John Groh, Takaho Hamada, Masaya Hasegawa, Masashi Hazumi, Charles Hill, Logan Howe, Oliver Jeong, Daisuke Kaneko, Brian Keating, Adrian T. Lee, David Leon, Eric Linder, Lindsay Ng Lowry, Aashrita Mangu, Frederick Matsuda, Yuto Minami, Satoshi Miyazaki, Hitoshi Murayama, Martin Navaroli, Haruki Nishino, Atsushi J. Nishizawa, Anh Thi Phuong Pham, Davide Poletti, Giuseppe Puglisi, Christian L. Reichardt, Blake D. Sherwin, Maximiliano Silva-Feaver, Praween Siritanasak, Joshua S. Speagle, Radek Stompor, Aritoki Suzuki, Philip J. Tait, Osamu Tajima, Masahiro Takada, Satoru Takakura, Sayuri Takatori, Daiki Tanabe, Masayuki Tanaka, Grant P. Teply, Calvin Tsai, Clara Verges, Ben Westbrook, Yuyang Zhou, The POLARBEAR Collaboration, the Subaru HSC SSP Collaboration. 2019-04-03. Evidence for the Cross-correlation between Cosmic Microwave Background Polarization Lensing from POLARBEAR and Cosmic Shear from Subaru Hyper Suprime-Cam. https://doi.org/10.3847/1538-4357/ab3424

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