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Umeda Lab
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A lab that uses numerical simulation to explore the lives and final explosions of stars and the origin of the elements.
AboutAbout the lab
From the final moments of stars to the origin of the elements
The Umeda Lab uses numerical simulations to study the evolution of stars and the origin of the elements.
The lab calculates how massive stars explode in supernovae and gamma-ray bursts at the end of their lives, starting from the stars' evolution before the explosion.
It also calculates the elements produced during the explosion and verifies the theory by comparing the results with the chemical composition of actual stars and galaxies.
For those considering an undergraduate research project or graduate school, the lab's website says it will provide an explanation via Zoom or similar tools upon request.
Key terms
- Supernova
- A huge explosion that occurs at the end of the life of a massive star or similar object. It suddenly shines brightly and scatters the elements made inside the star throughout space.
- Gamma-ray burst
- A phenomenon in which intense gamma rays are suddenly emitted from somewhere in the universe for only a short time. It is one of the most violent explosions in the universe.
- Nucleosynthesis
- The creation of heavier elements from lighter ones through nuclear fusion inside stars or during explosions.
NewsLab news
View More ↗ResearchResearch themes
To clarify how supernovae and gamma-ray bursts explode, the lab uses numerical calculations to reproduce the evolution and explosion of massive stars. By calculating the elements produced in the explosions, it works toward understanding the chemical evolution of galaxies and the origin of the elements.
*Illustrative imageEvolution and Explosions of Massive Stars and the Origin of the Elements
To uncover how supernovae and gamma-ray bursts explode, the lab uses numerical calculations to reproduce the evolution and explosion of massive stars before they explode. It also calculates the nucleosynthesis that takes place during the explosion and compares the results with the chemical composition of old, metal-poor stars and galaxies. By verifying the theory in this way, the lab works toward understanding the chemical evolution of galaxies and the origin of the elements.
*Illustrative imageRecords of the Moments Just Before the Explosion in a Supernova Remnant
As part of an international collaborative research group, the lab used X-ray observations of the supernova remnant Cassiopeia A to find evidence that, in the last few hours before the explosion, violent nuclear burning had disrupted the internal structure of the star.
MembersFaculty
The members of the Umeda Lab consist of faculty and master's students.As of 2026
- Associate ProfessorHideyuki Umeda
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “EtaCarinae” Nathan Smith (University of California, Berkeley), and NASA / Public domain (cropped)
- Evolution and Explosions of Massive Stars and the Origin of the Elements: “SN 1987A HST” ESA/Hubble & NASA / CC BY 4.0 (cropped)
- Records of the Moments Just Before the Explosion in a Supernova Remnant: “Crab Nebula” NASA, ESA, J. Hester and A. Loll (Arizona State University) / Public domain (cropped)
- Related lab (Fujii Lab): “Full Hubble ACS Image of NGC )” NASA, ESA, and the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration / Public domain (cropped)
- Related lab (Kashikawa Lab): “Subaru Telescope. Mauna Kea Summit ( )” Robert Linsdell / CC BY 2.0 (cropped)
- Related lab (Totani Lab): “Cosmic web” Volker Springel / Max Planck Institute For Astrophysics / CC BY-SA 4.0 (cropped)
- Related lab (Shimasaku Lab): “Webb's First Deep Field” NASA, ESA, CSA, and STScI / Public domain (cropped)
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