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The X-ray astronomy satellite XRISM, primarily developed by JAXA Institute of Space and Astronautical Science (ISAS), is set to launch on August 26th September 7th (Thursday). Equipped with the world’s most advanced X-ray spectroscopic capability, the XRISM satellite will shed light on the dynamic nature of the universe. It will unveil the velocity, turbulence, and other motions of high-temperature plasma in high-energy celestial bodies like galaxy clusters and black holes with unparalleled precision. The Nagoya University group, led by Assoc. …

Abstract Our group led by Associate Professor Kazuhiro Nakazawa at Nagoya University/KMI, and doctoral course student Yuki Omiya at the Graduate School of Science, in collaboration with the National Astronomical Observatory of Japan, Tokyo University of Science, Hiroshima University, Saitama University, JAXA Institute of Space and Astronautical Science, Tokyo Metropolitan University, Netherlands Institute for Space Sciences, and Toho University, succeeded in estimating the length, width, depth, and merging velocity of the shock wave just born in the nearby merging galaxy …

The values of fundamental constants of nature, dubbed as physical constants, might be affected by new elementary particles and unknown forces of nature, according to a study by an international group of researchers that includes Designated Assistant Professor Teppei Kitahara at KMI and Institute for Advanced Research, Nagoya University and at IPNS, KEK (cross appointment). The findings were published in the journal Physical Review Letters. Scientists continuously strive to develop and refine theories that explain the world and the universe …

The FASER collaboration (ForwArd Search ExpeRiment at the LHC; FASER) reported that the FASER detector has achieved observations accurate enough to detect the presence of neutrinos produced at the collider. Established in 2017, the FASER experiment aims to discover elementary particles that could contribute to a better understanding of dark matter, as well as to study neutrinos in the unexplored high-energy region to explore the unknown physical laws behind the Standard Model of elementary particles. The experiment focuses on secondary …

An international team of astrophysicists and cosmologists at various institutes including Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI) at Nagoya University, the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) at the University of Tokyo, and Princeton University have submitted a set of five papers, measuring the a value for the “clumpiness” of the universe’s dark matter, known to cosmologists as S8, of 0.76, which aligns with values that other gravitational lensing …

The XENON collaboration Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University (KMI) Institute for Space-Earth Environmental Research, Nagoya University (ISEE) Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo (Kavli IPMU) Institute for Cosmic Ray Research, The University of Tokyo (ICRR) Graduate School of Science, Kobe University credit: XENON Collaboration (E. Sacchetti) Scientists from the international XENON collaboration, an international experimental group including the Kobayashi-Maskawa Institute for the Origin of Particles …

As of January 1, 2023, Mr. Shota Takahashi has joined the KMI Public Relations Office. Mr. Takahashi previously worked as a science communicator at the High Energy Accelerator Research Organization (KEK) in Tsukuba. He has been recognized as a “Tsukuba Science Education Meister” for his continuous efforts in organizing the Science Café, and we expect that he will promote public relations and outreach activities at KMI to further spread the interest in elementary particles and the universe. Click here to …

credit: Reiko Matsushita (Nagoya University)   An international research group led by Associate Professor Hironao Miyatake at KMI, Nagoya University, Assistant Professor Yuichi Harikane and Professor Masami Ouchi at the Institute for Cosmic Ray Research, University of Tokyo, and their colleagues, have successfully detected the presence of dark matter around galaxies in the distant universe approximately 12 billion light years ago for the first time by combining data from the Hyper Suprime-Cam (HSC) camera on the Subaru Telescope and ESA/NASA’s …

Scientists from the international XENON collaboration, an international experimental group including the Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI), Nagoya University; the Institute for Space-Earth Environmental Research (ISEE), Nagoya University; the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), The University of Tokyo; the Institute for Cosmic Ray Research (ICRR), The University of Tokyo; and the Graduate School of Science, Kobe University, announced today the first results from XENONnT, the latest detector …