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2007

Full-sky maps for gravitational lensing of the CMB

Carbone, Carmelita, Springel, Volker, Baccigalupi, Carlo et al.

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We use the large cosmological Millennium Simulation (MS) to construct the first all-sky maps of the lensing potential and the deflection angle, aiming at gravitational lensing of the CMB, with the goal of properly including small-scale non-linearities and non-Gaussianity.

Exploiting the Born approximation, we implement a map-making procedure based on direct ray-tracing through the gravitational potential of the MS.
We stack the simulation box in redshift shells up to $z\sim 11$, producing continuous all-sky maps with arcminute angular resolution.
A randomization scheme avoids repetition of structures along the line of sight and structures larger than the MS box size are added to supply the missing contribution of large-scale (LS) structures to the lensing signal.

Full-sky maps for gravitational lensing of the CMB · Around

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