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Suwa Lab
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A lab that uses computation to unravel violent stellar phenomena such as supernova explosions and gamma-ray bursts.
AboutAbout the lab
Using computation to approach the great explosions that end a star's life.
The Suwa Lab studies the gravitational collapse that massive stars undergo at the end of their lives, and the explosions that accompany it.
The lab works on the mechanisms of supernova explosions and gamma-ray bursts, as well as the neutrinos and gravitational waves emitted by compact objects such as neutron stars.
These objects host physics at energies and densities beyond the reach of experiments on Earth.
By deepening understanding of these astronomical objects, the lab aims to approach the world of extreme physics.
Key terms
- Neutrino
- A very light elementary particle that carries no electric charge and passes through almost all matter
- Neutron star
- An object left behind after a supernova explosion, packing more than the mass of the Sun into a radius of only about 10 kilometers
- Gamma-ray burst
- A burst of intense gamma rays lasting from a moment to a few minutes, and one of the most violent explosions in the universe
ResearchResearch themes
The lab regards the violent astrophysical phenomena caused by stars as natural laboratories for investigating extreme physics beyond the reach of experiments on Earth. It studies supernova explosions, gamma-ray bursts, neutron stars, and the origin of the elements using a variety of methods, including simulations.
*Illustrative imageSupernova Simulations
Core-collapse supernovae are the huge explosions that massive stars undergo at the very end of their lives, and their mechanism is still not fully understood. The lab approaches the explosion mechanism by running simulations that combine neutrino radiation transport and hydrodynamics on supercomputers.
*Illustrative imageGamma-Ray Bursts
Gamma-ray bursts are known to arise from jets ejected at nearly the speed of light. The lab tackles the open questions of how these jets are produced and what happens as a jet drives its way through the star, using a variety of methods.
*Illustrative imageNeutron Stars
Because neutron stars are formed as a result of supernova explosions, they must be understood as part of one continuous process, from the supernova to the neutron star. The lab investigates how neutron stars form using supernova simulations, and also studies phenomena driven by the strong magnetic fields of magnetars, which are sometimes called the strongest magnets in the universe.
*Illustrative imageNucleosynthesis
The diverse elements found in the universe were made inside stars and supplied to space by supernova explosions. The lab studies how these elements came to be, as well as the nucleosynthesis taking place inside supernovae.
MembersFaculty
The members of the Suwa Lab consist of faculty, project researchers, JSPS Research Fellows, and doctoral and master's students.As of 2026
- Associate ProfessorYudai SuwaPublications ↗
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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: “Crab Nebula” NASA, ESA, J. Hester and A. Loll (Arizona State University) / Public domain (cropped)
- Supernova Simulations: “Webb, Chandra, Hubble, and Spitzer Together Explore Cassiopeia A (SVS f86700b o)” NASA's Scientific Visualization Studio - Global Science and Technology, Inc./Amy Moran, Center for Astrophysics | Harvard & Smithsonian/Kimberly Arcand / Public domain (cropped)
- Gamma-Ray Bursts: “Artist’s impression of a gamma-ray burst” ESO/A. Roquette / CC BY 4.0 (cropped)
- Neutron Stars: “Artist’s impression of the magnetar in the star cluster Westerlund 1” ESO/L. Calçada / CC BY 4.0 (cropped)
- Nucleosynthesis: “Cassiopeia A- Chandra Maps Vital Elements in Supernovas (1999-casajph - casa)” NASA/CXC/SAO/Rutgers/J.Hughes / Public domain (cropped)
- Related lab (Saito Lab): “Digital oscilloscope in use” Radarvector / CC BY-SA 4.0 (cropped)
- Related lab (University of Tokyo Baba Lab): “PVC Brainstorming Workshop ( )” BLM Nevada / Public domain (cropped)
- Related lab (Narita Lab): “Artist's impression of a transiting extrasolar planet (heic0612b)” NASA, ESA and G. Bacon / Public domain (cropped)
- Related lab (Kanai Lab): “CSIRO ScienceImage 11431 Computer model image of a rogue wave smashing into a semisubmersible platform weighing around 32000 tonnes” division, CSIRO / CC BY 3.0 (cropped)
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