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Cross-correlation of cmb polarization lensing with high-z submillimeter herschel-atlas galaxies

  • Author(s): Faúndez, 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
  • Vergès, C
  • et al.
Abstract

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.

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