학술논문
Evidence for the Cross-correlation between Cosmic Microwave Background Polarization Lensing from POLARBEAR and Cosmic Shear from Subaru Hyper Suprime-Cam
Document Type
Working Paper
Author
Namikawa, Toshiya; Chinone, Yuji; Miyatake, Hironao; Oguri, Masamune; Takahashi, Ryuichi; Kusaka, Akito; Katayama, Nobuhiko; Adachi, Shunsuke; Aguilar, Mario; Aihara, Hiroaki; Ali, Aamir; Armstrong, Robert; Arnold, Kam; Baccigalupi, Carlo; Barron, Darcy; Beck, Dominic; Beckman, Shawn; Bianchini, Federico; Boettger, David; Borrill, Julian; Cheung, Kolen; Corbett, Lance; Crowley, Kevin T.; Bouhargani, Hamza El; Elleflot, Tucker; Errard, Josquin; Fabbian, Giulio; Feng, Chang; Galitzki, Nicholas; Goeckner-Wald, Neil; Groh, John; Hamada, Takaho; Hasegawa, Masaya; Hazumi, Masashi; Hill, Charles; Howe, Logan; Jeong, Oliver; Kaneko, Daisuke; Keating, Brian; Lee, Adrian T.; Leon, David; Linder, Eric; Lowry, Lindsay Ng; Mangu, Aashrita; Matsuda, Frederick; Minami, Yuto; Miyazaki, Satoshi; Murayama, Hitoshi; Navaroli, Martin; Nishino, Haruki; Nishizawa, Atsushi J.; Pham, Anh Thi Phuong; Poletti, Davide; Puglisi, Giuseppe; Reichardt, Christian L.; Sherwin, Blake D.; Silva-Feaver, Maximiliano; Siritanasak, Praween; Speagle, Joshua S.; Stompor, Radek; Suzuki, Aritoki; Tait, Philip J.; Tajima, Osamu; Takada, Masahiro; Takakura, Satoru; Takatori, Sayuri; Tanabe, Daiki; Tanaka, Masayuki; Teply, Grant P.; Tsai, Calvin; Verges, Clara; Westbrook, Ben; Zhou, Yuyang; Collaboration, The POLARBEAR; Collaboration, the Subaru HSC SSP
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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.
Comment: 16 pages, 5 figures, Accepted for publication in ApJ
Comment: 16 pages, 5 figures, Accepted for publication in ApJ