Observational Cosmology

Study of Dark Energy with Subaru telescope: Hyper Suprime-Cam

As an observational cosmology project, we have been involved in building a 1.2 Giga pixel CCD camera (Hyper Suprime-Cam) mounted on the prime focus of the Subaru telescope. With this wide-field camera, we plan to conduct an extensive wide-filed deep survey to investigate the weak lensing. This data will be used to develop a 3-D mass mapping of the universe. It, in turn, will be used to study Dark Energy.

We developed a novel method of measuring the cluster lensing distortion profiles, and adopted it to Suprime-Cam data. We will continue to study dark matter and dark energy with the data from wide-field survey.