Using the powerful Japanese Subaru telescope, the Hyper Suprime-Cam (HSC) survey collaboration team has made and analyzed the deepest wide field map of the three-dimensional distribution of matter in the Universe. The reserach team, including researchers from Nagoya University, Professor Naoshi Sugiyama at KMI/Graduate School of Science, Lecturer Atsushi Nishizawa and Assistant Professor Hironao Miyatake at Institute for Advanced Research, has used the gravitational distortion of images of about 10 million galaxies to make a precise measurement of the lumpiness of matter in the Universe. By combining this measurement with the European Space Agency Planck satellite’s observations of the cosmic microwave background and other cosmological experiments, the team has been able to further constrain the properties of the “dark energy” that dominates the energy density of the Universe.

Press release https://www.ipmu.jp/en/20180926-HSC-S8

Preprint https://arxiv.org/abs/1809.09148