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Gravitational lensing as a contaminant of the gravity wave signal in CMB
Uros Seljak, Christopher M. Hirata
Gravity waves (GW) in the early universe generate B-type polarization in the cosmic microwave background (CMB), which can be used as a direct way to measure the energy scale of inf…
Weak Lensing and CMB: Parameter forecasts including a running spectral index
Mustapha Ishak, Christopher M. Hirata, Patrick McDonald +1
We use statistical inference theory to explore the constraints from future galaxy weak lensing (cosmic shear) surveys combined with the current CMB constraints on cosmological para…
Reconstruction of lensing from the cosmic microwave background polarization
Christopher M. Hirata, Uros Seljak
Gravitational lensing of the cosmic microwave background (CMB) polarization field has been recognized as a potentially valuable probe of the cosmological density field. We apply li…
Shear calibration biases in weak lensing surveys
Christopher M. Hirata, Uros Seljak
We investigate biases induced by the conversion between the observed image shape to shear distortion in current weak lensing analysis methods. Such overall calibration biases canno…