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Egusa Lab
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The lab uses radio observations to study how gas moves and how stars are born in spiral galaxies.
AboutAbout the lab
Reading the gas in spiral galaxies through radio waves
The Egusa Lab studies how gas moves and how stars form in spiral and barred spiral galaxies.
The lab belongs to the Radio Astronomy Group at the Institute of Astronomy, and its observations center on ALMA, which operates in the Atacama highlands of Chile.
Using the spectral lines of molecules and atoms visible at radio, millimeter, and submillimeter wavelengths, the lab investigates the interstellar medium of galaxies.
The lab is also pursuing statistical studies that compile large numbers of molecular clouds in nearby galaxies and in the Milky Way.
Key terms
- Interstellar medium
- The gas and dust spread out between stars. It is the raw material from which new stars form.
- Molecular cloud
- A dense cloud of gas in which hydrogen and other elements are gathered in molecular form. It is a place where stars are born.
- ALMA
- A radio telescope in the Atacama highlands of Chile. It combines many antennas to observe at millimeter and submillimeter wavelengths.
NewsLab news
Master's students and others discover high-velocity molecular clouds in the barred spiral galaxy M83
ResearchResearch themes
As part of the Radio Astronomy Group, the lab observes gas in galaxies with radio telescopes in Japan and abroad, including ALMA. The Egusa Lab works on the dynamics of gas in disk and spiral galaxies, giant molecular clouds, and star formation.
*Illustrative imageGas in Spiral and Barred Spiral Galaxies
The lab studies how the interstellar medium in spiral and barred spiral galaxies is distributed and how it moves (its dynamics). The interstellar gas in the barred spiral galaxy M83 and its high-velocity molecular clouds are also among the lab's research targets.
*Illustrative imageStatistical Studies of Molecular Clouds
This research compiles large numbers of molecular clouds in nearby galaxies and in the Milky Way and examines their properties statistically.
*Illustrative imageHost Galaxies of Transient Events
The lab investigates the properties of galaxies that host transient events such as gamma-ray bursts, superluminous supernovae, and fast radio bursts.
MembersFaculty
The Radio Astronomy Group, to which the Egusa Lab belongs, consists of faculty members, project researchers, doctoral and master's students, and visiting collaborative researchers.As of 2026
- Associate ProfessorFumi EgusaPublications ↗
- Assistant ProfessorKana Morokuma
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.
- Top image: “M83 - Southern Pinwheel” (Credit) ESO / CC BY 4.0 (cropped)
- Gas in Spiral and Barred Spiral Galaxies: “The NGC 1300 galaxy as seen with ALMA (ngc1300-alma-cc)” ESO/ALMA (ESO/NAOJ/NRAO)/PHANGS / CC BY 4.0 (cropped)
- Statistical Studies of Molecular Clouds: “The NGC 4254 galaxy as seen with ALMA (ngc4254-alma-cc)” ESO/ALMA (ESO/NAOJ/NRAO)/PHANGS / CC BY 4.0 (cropped)
- Host Galaxies of Transient Events: “Fast Radio Burst 180916 Host Galaxy (unannotated) (noirlab2002b)” Gemini Observatory/NOIRLab/NSF/AURA / CC BY 4.0 (cropped)
- Related lab (Izumi Lab): “Artist’s impression of the active galactic nucleus of Messier 77 (eso2203d)” ESO/M. Kornmesser and L. Calçada / CC BY 4.0 (cropped)
- Related lab (Kohno Lab): “ALMA antennas on Chajnantor (malin-dsc0027)” ESO/C. Malin / CC BY 4.0 (cropped)
- Related lab (Kashikawa Lab): “Subaru Telescope. Mauna Kea Summit ( )” Robert Linsdell / CC BY 2.0 (cropped)
- Related lab (Shimasaku Lab): “Webb's First Deep Field” NASA, ESA, CSA, and STScI / Public domain (cropped)
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