Cross-correlation of CMB Polarization Lensing with High-z Submillimeter Herschel-ATLAS Galaxies

Author(s): Faundez, MA; Arnold, K; Baccigalupi, C; Barron, D; Beck, D; Bianchini, F; Boettger, D; Borrill, J; Carron, J; Cheung, K; Chinone, Y; Bouhargani, HE; Elleflot, T; Errard, J; Fabbian, G; Feng, C; Galitzki, N; Goeckner-Wald, N; Hasegawa, M; Hazumi, M; Howe, L; Kaneko, D; Katayama, N; Keating, B; Krachmalnicoff, N; Kusaka, A; Lee, AT; Leon, D; Linder, E; Lowry, LN; Matsuda, F; Minami, Y; Navaroli, M; Nishino, H; Pham, ATP; Poletti, D; Puglisi, G; Reichardt, CL; Sherwin, BD; Silva-Feaver, M; Stompor, R; Suzuki, A; Tajima, O; Takakura, S; Takatori, S; Teply, GP; Tsai, C; Verges, C | Abstract: © 2019. The American Astronomical Society. All rights reserved We report a 4.8σ measurement of the cross-correlation signal between the cosmic microwave background (CMB) lensing convergence reconstructed from measurements of the CMB polarization made by the Polarbear experiment and the infrared-selected galaxies of the Herschel-ATLAS survey. This is the first measurement of its kind. We infer a best-fit galaxy bias of b=5.76\pm 1.25, corresponding to a host halo mass log10(Mh M⊙. =13.5+0.2-0.3 of at an effective redshift of z ∼ 2 from the cross-correlation power spectrum. Residual uncertainties in the redshift distribution of the submillimeter galaxies are subdominant with respect to the statistical precision. We perform a suite of systematic tests, finding that instrumental and astrophysical contaminations are small compared to the statistical error. This cross-correlation measurement only relies on CMB polarization information that, differently from CMB temperature maps, is less contaminated by galactic and extragalactic foregrounds, providing a clearer view of the projected matter distribution. This result demonstrates the feasibility and robustness of this approach for future high-sensitivity CMB polarization experiments.