Journal
PHYSICAL REVIEW D
Volume 90, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.90.023003
Keywords
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Funding
- U.S. Department of Energy [DE-FG02-13ER41958]
- Kavli Institute for Cosmological Physics at the University of Chicago [NSF PHY-0114422, NSF PHY-0551142]
- David and Lucile Packard Foundation
- Leverhulme Trust
- Science and Technology Facilities Council
- STFC [ST/J001511/1] Funding Source: UKRI
- Direct For Mathematical & Physical Scien
- Division Of Physics [1125897] Funding Source: National Science Foundation
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Lensing of the cosmic microwave background by modes that are larger than the size of the survey dilates intrinsic scales in the temperature and polarization fields and coherently shifts their observed power spectra with respect to the ensemble or all-sky mean. The effect can be simply encapsulated as a contribution to the power spectrum covariance matrix in accordance with the lensing trispectrum or as an additional parameter, the mean convergence in the field, for parameter estimation. It should be included for upcoming surveys that precisely measure acoustic polarization features deep into the damping tail at multipoles of l greater than or similar to 1500 with less than 10% of the sky. Its omission may lead to seemingly conflicting values for the angular scale of the sound horizon, which may then provide erroneous cosmological parameters when compared to baryon acoustic oscillation measurements.
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