News＆Topics
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Award: Wakasyachi Incentive AwardI have been awarded the 20th Wakasyachi Incentive Award. 
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Hoshinavi magazineA feature article introducing ten recent advances in astronomy, titled "25 Keywords to Understand the Present of Astronomy and Space Science," appeared in the October 2025 issue of Hoshinavi magazine. 
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The Astronomical HeraldA feature article titled "Origin of Cosmic Rays in the Galaxy" was published in the October 2025 issue of the Astronomical Herald, the bulletin of the Astronomical Society of Japan. 
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Motivation
How do stars live and die? |
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Stars are not eternal. Over millions to billions of years, they are born from interstellar gas, forge the chemical elements through nuclear fusion, and ultimately return those elements to space, where they become the raw material for new stars, planets, and life itself. Our own bodies are part of this continuous cycle of cosmic evolution.
As a middle school student, I was deeply inspired by the realization that the atoms composing our bodies were created in ancient stars. The idea that our existence is intimately connected to the life cycle of the Universe—even across immense distances and timescales—left a lasting impression on me and ultimately led me to pursue a career in astronomy. Today, I mainly investigate one of the final stages of stellar evolution: supernova remnants (SNRs) *1.
The life cycle of stars and the cosmic recycling of matter (adapted from The Birth of the Universe by Yasuo Fukui).
Research Interest
Unveiling SNRs through Multi-wavelength Analysis |
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In recent years, multi-wavelength analysis, which combines observational data at two or more wavelengths, has become an essential approach for understanding complex astronomical phenomena. Because different wavelengths trace different physical processes, this method allows us to study a single object from multiple perspectives. For example, radio observations at a wavelength of 2.6 mm can trace cold molecular gas clouds, the raw material for star formation, at temperatures of approximately 10 K (about minus 263 degrees Celsius). In contrast, X-ray observations reveal plasma heated to tens of millions of degrees, as well as emission from relativistic cosmic-ray electrons.
Supernova remnants (SNRs) are ideal laboratories for multi-wavelength studies, as they shine brightly across nearly the entire electromagnetic spectrum, from radio waves to gamma rays (Fig. 1). My research focuses particularly on combining radio observations with X-ray and gamma-ray data, an approach that has not yet been fully explored, to investigate the origin and acceleration mechanisms of cosmic rays, one of the century-old mysteries of modern astrophysics.
*1: A supernova remnant (SNR) is an expanding shell of hot gas produced by the final explosion of a star. It has a profound impact on interstellar space through shock waves traveling at up to 10,000 km/s, the dispersal of heavy elements, and the acceleration of high-energy particles.
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