Speaker
Yuji Chinone
(University of California, Berkeley)
Description
POLARBEAR is a cosmic microwave background radiation (CMB) polarization experiment located at the Atacama desert in Chile. The science goals of the POLARBEAR experiment are to characterize the B-mode signal from gravitational lensing, as well as to search for the B-mode signal created by primordial gravitational waves (PGWs). POLARBEAR started observations in 2012, and has published a series of results from its first and second seasons of observations, including the first measurement of a non-zero B-mode angular auto-power spectrum at sub-degree scales where the dominant signal is gravitational lensing of the CMB. In 2016, we installed a continuously rotating half wave plate (HWP) at the focus of the primary mirror to search PWGs with demonstrating control of low frequency noise.
In this talk, we present the first measurement of cross-correlation between the lensing potential, reconstructed from CMB polarization data by POLARBEAR, and the cosmic shear field from galaxy shapes by the Subaru Hyper Suprime-Cam (HSC) survey. We also present the status of the measurement of large angular scale B-mode signal induced by PGWs with the HWP.
Primary author
Yuji Chinone
(University of California, Berkeley)
