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Research Paper on Cosmology with Subaru/HSC Wins the PASJ Excellent Paper Award

March 31, 2021
Last updated: May 27, 2021

In March 2021, a research paper on observational cosmology based on observations with Subaru Hyper Suprime-Cam (HSC) earned the PASJ Excellent Paper Award for the most outstanding paper published in the Publications of the Astronomical Society of Japan (ASJ). The award ceremony was held in the ASJ biannual meeting in March.

The study of a research team, led by Dr. Chiaki Hikage (Associate Professor of Kavli-IPMU), revealed the amount and distributions of dark matter using weak lensing effect by large-scale structure appearing on images of more distant galaxies, and quickly drew worldwide attention, leading to this award. The research work is available in the press release on this web.

Dr. Hikage, the first author of the paper, said "I'm very glad that we have received this distinction for our research on cosmology with the Subaru Telescope and HSC. I would like to express my deep gratitude to the HSC team for their tremendous efforts that made the award possible. The result is based on initial data of the HSC project. With more collection of data from HSC, further study will uncover the properties of dark matter and dark energy. We are encouraged by the award to make more progress."

Dr. Satoshi Miyazaki (Professor of NAOJ), who has been leading construction of HSC and science with the instrument, said "Our pioneers’ efforts brought forth the excellent optical and mechanical performance of the Subaru Telescope, which enables sharp images with the heavy camera HSC mounted on the prime focus of the telescope. This provides the basis of the result reported by the paper."

The paper was published in PASJ on March 6, 2019: Chiaki Hikage et al., "Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data").

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