期刊
PHYSICAL REVIEW LETTERS
卷 112, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.131302
关键词
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资金
- DOE [DE-AC02-05CH11231]
- NSF [AST-0618398, AST-1212230]
- MEXT KAKENHI [21111002]
- KEK Cryogenics Science Center
- Natural Sciences and Engineering Research Council and Canadian Institute for Advanced Research
- NASA Postdoctoral Program
- Miller Fellowship
- Simons Foundation
- Joan and Irwin Jacobs
- Comision Nacional de Investigacicn Cientfica y Tecnologica de Chile (CONICYT)
- STFC [ST/K000926/1] Funding Source: UKRI
- Grants-in-Aid for Scientific Research [25610065, 24684017, 21111002, 13J03626, 14J01662] Funding Source: KAKEN
We reconstruct the gravitational lensing convergence signal from cosmic microwave background (CMB) polarization data taken by the POLARBEAR experiment and cross-correlate it with cosmic infrared background maps from the Herschel satellite. From the cross spectra, we obtain evidence for gravitational lensing of the CMB polarization at a statistical significance of 4.0 sigma and indication of the presence of a lensing B-mode signal at a significance of 2.3 sigma. We demonstrate that our results are not biased by instrumental and astrophysical systematic errors by performing null tests, checks with simulated and real data, and analytical calculations. This measurement of polarization lensing, made via the robust cross-correlation channel, not only reinforces POLARBEAR auto-correlation measurements, but also represents one of the early steps towards establishing CMB polarization lensing as a powerful new probe of cosmology and astrophysics.
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