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Universe Group (Yukawa Institute) Lab
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The lab takes on the mysteries of the universe with general relativity and particle theory.
AboutAbout the lab
Taking on dark matter, dark energy, and the great mysteries of the universe
The Universe Group (Yukawa Institute) lab seeks to understand the extreme structures of the universe and the world of elementary particles, using general relativity and particle theory as its two main tools.
Drawing on astronomical observation data, particle experiment data, and computer simulations, the lab aims to establish a modern view of the universe and of matter.
The lab tackles the three big mysteries of cosmology, namely dark energy, dark matter, and inflation, by every available means.
Key terms
- Inflation
- The theory that the newborn universe expanded extremely rapidly over a very short time
- Numerical relativity
- A method of studying phenomena involving strong gravity by solving the Einstein equations on a computer
- Weak gravitational lensing
- The effect by which light from distant galaxies is slightly bent by the gravity of matter in front of them. It makes it possible to measure the distribution of invisible matter
ResearchResearch themes
Using general relativity and particle theory as its two main tools, the lab works to understand the extreme structures found in the universe and the world of elementary particles, drawing on astronomical observation data, particle experiment data, and computer simulations.
*Illustrative imageTheoretical Cosmology and Gravity
The lab explores the possibility of modifying the theory of gravity to address the problem of dark energy.
*Illustrative imageObservational Cosmology
With Subaru Telescope weak gravitational lensing and galaxy redshift surveys in mind, the lab develops methods for testing cosmological models against observations. It uses analytical calculations, large-scale numerical simulations, and statistical methods such as machine learning.
*Illustrative imageGravitational Waves and Numerical Relativity
The lab solves the Einstein equations using numerical relativity to determine the motion of gravitational-wave sources and the waveforms of the gravitational waves they emit. It also studies the electromagnetic emission and the synthesis of heavy elements produced by mergers of binary neutron stars.
*Illustrative imageHigh-Energy Astrophysics
The lab addresses high-energy astrophysical phenomena, such as relativistic jets and huge explosions in which black holes and neutron stars play central roles, using general relativity, quantum theory, statistical mechanics, and fluid dynamics.
MembersFaculty
- ProfessorMasaru Shibata
- ProfessorShinji Mukohyama
- ProfessorKunihito Ioka
- Associate ProfessorAstushi Taruya
- Associate ProfessorAntonio De Felice
- LecturerYoko Oya
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: “Subaru Telescope (840A5789-CC)” International Gemini Observatory/NOIRLab/NSF/AURA / CC BY 4.0 (cropped)
- Theoretical Cosmology and Gravity: “Model rendering of the Dark Energy Camera (model-decam)” NOIRLab / CC BY 4.0 (cropped)
- Observational Cosmology: “Illustration of a gravitational lensing effect (heic0814f)” NASA, ESA, and Johan Richard (Caltech, USA) Acknowledgement: Davide de Martin & James Long (ESA/Hubble) / Public domain (cropped)
- Gravitational Waves and Numerical Relativity: “Neutron Star Merger (noirlab2518f)” International Gemini Observatory/NOIRLab/NSF/AURA/Double Dome Films / CC BY 4.0 (cropped)
- High-Energy Astrophysics: “Quasar 3C273 Full Ground-Based Color Image” Ngc1535 / CC BY-SA 4.0 (cropped)
- Related lab (Particle Theory Lab (Yukawa Institute for Theoretical Physics)): “AdSE like hyp” Anton Sel / CC BY-SA 4.0 (cropped)
- Related lab (Nuclear Theory Lab (Yukawa Institute for Theoretical Physics)): “Table of nuclides with Halo nucleus” Chang-Bum Moon / CC BY 3.0 (cropped)
- Related lab (Cosmic Ray Lab): “XRISM 003” NASA's Goddard Space Flight Center Conceptual Image Lab / Public domain (cropped)
- Related lab (Theoretical Astrophysics Lab): “MergingBinaryBlackHoles” NASA/Ames Research Center/Christopher E. Henze / Public domain (cropped)
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