Quadratic estimator reconstructs kSZ remote dipole from Planck and unWISE data with S/N of order unity, constrains multiplicative optical depth bias b_v < 1.04 at 68% confidence after foreground cleaning.
Superhorizon Perturbations and the Cosmic Microwave Background
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abstract
Superhorizon perturbations induce large-scale temperature anisotropies in the cosmic microwave background (CMB) via the Grishchuk-Zel'dovich effect. We analyze the CMB temperature anisotropies generated by a single-mode adiabatic superhorizon perturbation. We show that an adiabatic superhorizon perturbation in a LCDM universe does not generate a CMB temperature dipole, and we derive constraints to the amplitude and wavelength of a superhorizon potential perturbation from measurements of the CMB quadrupole and octupole. We also consider constraints to a superhorizon fluctuation in the curvaton field, which was recently proposed as a source of the hemispherical power asymmetry in the CMB.
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astro-ph.CO 1years
2024 1verdicts
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Kinetic Sunyaev Zel'dovich velocity reconstruction from Planck and unWISE
Quadratic estimator reconstructs kSZ remote dipole from Planck and unWISE data with S/N of order unity, constrains multiplicative optical depth bias b_v < 1.04 at 68% confidence after foreground cleaning.