Speaker
Claudia Antolini
(SISSA, Trieste)
Description
After multiple high precision detections (ACT, SPT, Planck) gravitational lensing has become
a new source of relevant cosmological information: combining it with other probes
(e.g. the large scale structure) can give significant insight on the evolution of the
Dark Energy component. Developing new algorithms of estimate of this signal will allow
the community to exploit this observable as a new and independent probe in cosmology.
In my talk I will present the reconstruction of the lensing shear pattern and its
angular power spectrum from total intensity and polarised CMB maps obtained
using Born approximated ray-tracing through N-body simulated structures.The recovered
spectra are in agreement with predictions of the underlying ΛCDM with no visible
bias, on a scale interval which extends from the arcminute to several degrees
over the sky. This demonstrates the feasibility of CMB lensing studies based
on large scale simulations of cosmological structure formation in the context of the
upcoming large observational campaigns. First results on the extraction of the
lensing spectrum from CMB maps lensed by N-body simulations with massive neutrinos
will also be discussed.
