Evidence for Gravitational Lensing of the Cosmic Microwave Background Polarization from Cross-Correlation with the Cosmic Infrared Background
Abstract
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 4.0σ and indication of the presence of a lensing B-mode signal at a significance of 2.3σ. 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.
Additional Information
© 2014 American Physical Society. Received 26 December 2013; revised manuscript received 13 February 2014; published 2 April 2014. We thank Frank Wuerthwein, Igor Sfiligoi, Terrence Martin, and Robert Konecny for their insight and support, and thank Nolberto Oyarce and José Cortes for their invaluable contributions. Calculations were performed at the Department of Energy Open Science Grid [39] at the University of California, San Diego, accessed via the GlideinWMS [40], at Central Computing System, owned and operated by the Computing Research Center at KEK, and at NERSC which is supported by the DOE under Contract No. DE-AC02-05CH11231. The POLARBEAR project is funded by the NSF under Grants No. AST-0618398 and No. AST-1212230. The KEK authors were supported by MEXT KAKENHI Grant No. 21111002, and acknowledge support from KEK Cryogenics Science Center. The McGill authors acknowledge funding from the Natural Sciences and Engineering Research Council and Canadian Institute for Advanced Research. N. M., B. D. S., and K. A. acknowledge support from the NASA Postdoctoral Program, a Miller Fellowship, and the Simons Foundation, respectively. M. S. gratefully acknowledges support from Joan and Irwin Jacobs. The James Ax Observatory operates in the Parque Astronómico Atacama in Northern Chile under the auspices of the Comisión Nacional de Investigación Científica y Tecnológica de Chile (CONICYT). Finally, we acknowledge the tremendous contributions by Huan Tran to the POLARBEAR project.Attached Files
Published - PhysRevLett.112.131302.pdf
Submitted - 1312.6645v2.pdf
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Additional details
- Eprint ID
- 46159
- Resolver ID
- CaltechAUTHORS:20140609-141903014
- DE-AC02-05CH11231
- Department of Energy (DOE)
- AST-0618398
- NSF
- AST-1212230
- NSF
- 21111002
- MEXT KAKENHI
- KEK Cryogenics Science Center
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Canadian Institute for Advanced Research (CIAR)
- NASA Postdoctoral Program
- Miller Fellowship
- Simons Foundation
- Joan and Irwin Jacobs
- Created
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2014-06-09Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field