Toward a precise measurement of weak lensing signals with CMB and galaxy observations: A theoretical developement and its cosmological implications
Toshiya Namikawa
University of Tokyo
Several cosmological observations in the last decade have successfully
led to the establishment of a fundamental framework in cosmology. Taking
seriously account of our current understanding and lack of our knowledge
of the universe, the cosmology in the coming decade should focus on more
advanced and fundamental issues. One of the powerful probe to tackle
these fundamental issues is weak gravitational lensing; a deflection of
photons emitted from, e.g., last scattering surface of CMB or galaxies.
In this talk, I show what can we probe by measuring weak lensing signals
of CMB, especially focusing on odd-parity quantites, such as curl mode of
deflection angle and B-mode shear. I also discuss our proposed estimator
for CMB lensing reconstruction which is more robust than the current
estimator with minimal loss of signal to noise.
Date: | Thursday, 6 December 2012 |
Time: | 15:30 |
Where: | McGill University |
| Ernest Rutherford Physics Building, Piano Room (room 211) |
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