- Main
Cross-correlation of CMB Polarization Lensing with High-z Submillimeter Herschel-ATLAS Galaxies
- Faúndez, M Aguilar;
- Arnold, K;
- Baccigalupi, C;
- Barron, D;
- Beck, D;
- Bianchini, F;
- Boettger, D;
- Borrill, J;
- Carron, J;
- Cheung, K;
- Chinone, Y;
- Bouhargani, H El;
- 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
Published Web Location
https://doi.org/10.3847/1538-4357/ab4a78Abstract
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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