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Kodama Lab
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A lab that observes distant galaxy clusters with the Subaru Telescope and other facilities to explore the formation and evolution of galaxies.
AboutAbout the lab
Exploring how galaxies came to be through galaxy clusters in the distant universe
The Kodama Lab studies galaxy clusters and distant galaxies, taking advantage of the wide field of view of the Subaru Telescope.
The lab maps galaxy clusters in the distant universe together with the large-scale structures around them, and investigates the formation and evolution of galaxies, whose existence depends strongly on their environment.
In addition to the Subaru Telescope, the lab observes with ALMA and also plans an imaging survey using SWIMS, a near-infrared instrument.
The descriptions on the research overview page date from around 2018.
Key terms
- Galaxy cluster
- A group in which many galaxies are gathered together. Within the large-scale structure surrounding it, galaxies evolve under the influence of their environment.
- Narrow-band imaging
- Observation in which images are taken using a narrow-band filter. This lab uses it to capture star-forming galaxies all at once.
- Protocluster
- A collection of galaxies in the distant universe at the stage where a galaxy cluster is in the process of forming.
ResearchResearch themes
This lab maps galaxy clusters in the distant universe and the large-scale structures around them, and investigates the formation and evolution of galaxies, whose existence depends strongly on their environment. Centered on Subaru Telescope observations, it also observes with ALMA and plans observations using a new near-infrared instrument.
*Illustrative imageStar formation history during the formation of galaxy clusters
In the MAHALO-Subaru project, the lab uses narrow-band imaging to observe the universe at the era thought to be the peak of galaxy formation, capturing star-forming galaxies comprehensively. Using multi-object near-infrared spectroscopy and integral field spectroscopy, it examines the interiors of distant galaxies and explores the physical mechanisms that accelerate galaxy formation in protoclusters.
*Illustrative imageGalaxies in formation seen with ALMA
In the Gracias-ALMA project, the lab uses ALMA to observe the molecular gas and dust emission of star-forming galaxies in their formation phase. It investigates where and in what mode star formation takes place in galaxies that are still forming, and how this differs depending on the environment in which the galaxies live.
*Illustrative imageSearching for distant galaxy clusters with an ultra-wide-field camera
The lab searches for distant galaxy clusters using data from Hyper Suprime-Cam (HSC), the Subaru Telescope's ultra-wide-field camera. Using both red galaxies that have finished forming stars and blue galaxies that are actively forming stars as clues, it aims to understand the properties and evolution of more typical cluster galaxies.
*Illustrative imageMulti-color observations with the near-infrared instrument SWIMS
The lab is making many medium-band and narrow-band filters for the new near-infrared instrument SWIMS, with the aim of carrying out SWIMS-18, an imaging survey in a very large number of colors. SWIMS can obtain spectra across the entire near-infrared range at once, and precise analysis of emission-line ratios makes it possible to study the physical state of distant galaxies.
MembersFaculty
- ProfessorTadayuki Kodama
VoicesStudent voices
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Kashiyama LabFaculty of Science, Department of Astronomy and GeophysicsMulti-messenger astronomy; theoretical study of high-energy …The information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
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: “Galaxy cluster Abell 1689 and distant galaxies ( )” Hubble ESA / CC BY 2.0 (cropped)
- Star formation history during the formation of galaxy clusters: “Hubble Pinpoints Farthest Protocluster of Galaxies Ever Seen ( )” NASA Goddard Space Flight Center from Greenbelt, MD, USA / Public domain (cropped)
- Galaxies in formation seen with ALMA: “ALMA antennas (alma-mar )” ALMA (ESO/NAOJ/NRAO) / CC BY 4.0 (cropped)
- Searching for distant galaxy clusters with an ultra-wide-field camera: “Enhanced image of Intracluster light in the Abell 85 galaxy cluster (noirlab2333a)” Astronomical Data/Image: M. Montes (Instituto de Astrofísica de Canarias); Artistic Enhancement: J. Pinto (Rubin Observatory). / CC BY 4.0 (cropped)
- Multi-color observations with the near-infrared instrument SWIMS: “Engineers Install Near Infrared Camera into the Heart of Webb Telescope ( )” Chris Gunn / Public domain (cropped)
- Related lab (Ichikawa Lab): “Montage of the Event Horizon Telescope observatories (night) (eso2208-eht-mwg)” ESO/M. Kornmesser. Images of individual telescopes: ALMA: ESO. APEX: ESO. LMT: INAOE Archives. GLT: N. Patel. JCMT: EAO-W. Montgomerie. SMT: D. Harvey. 30m: N. Billot. SPT: Wikipedia. SMA: S. R. Schimpf. NOEMA: IRAM. Kitt Peak: Wikipedia Milky Way: N. Risinger (skysurvey.org) / CC BY 4.0 (cropped)
- Related lab (Murayama Lab): “Messier83 - Heic1403a” Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA) Acknowledgement: William Blair (Johns Hopkins University) / Public domain (cropped)
- Related lab (Yamada Lab): “Chandra X-ray Observatory after release from Space Shuttle Columbia” NASA/STS-93/Cady Coleman / Public domain (cropped)
- Related lab (Kashiyama Lab): “Black hole's accretion disk blank” NASA’s Goddard Space Flight Center/Jeremy Schnittman, cmglee / CC BY-SA 4.0 (cropped)
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