2022 Fiscal Year Annual Research Report
Distribution of distant galaxy size and luminosity
| Project/Area Number |
21F21325
|
|---|
| Allocation Type | Single-year Grants |
|---|
| Research Institution | The University of Tokyo |
|---|
| Host Researcher |
SILVERMAN John 東京大学, カブリ数物連携宇宙研究機構, 教授 (90573030)
|
|---|
| Foreign Research Fellow |
YANG LILAN 東京大学, カブリ数物連携宇宙研究機構, 外国人特別研究員
|
|---|
| Project Period (FY) |
2021-11-18 – 2024-03-31
|
| Keywords | JWST / high-redshift galaxies / near-infrared |
|---|
| Outline of Annual Research Achievements |
The size-luminosity relation of bright galaxies in the early Universe has been investigated. We performed final analysis using the observation data from JWST. The data is from one of the early release science projects of JWST, and enable us to probe the high-redshift galaxy morphology and scaling relation for the first time. We published results showing that size of high redshift galaxies does not vary significantly as a function of wavelength and detected a tentative steeper slope of size luminosity relation at the rest-frame UV band which indicates that the faint galaxies have extremely small sizes. In addition, the size-mass relation of bright cluster galaxies was measured using the Hyper Suprime-Cam survey. This work demonstrates the uniformity of this important galaxy population.
|
| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Currently, we are planning similar analysis to the JWST-GLASS program using the large JWST imaging program COSMOS-Web to characterize galaxy morphologies over the last 8 billion years. Tools are ready to measure the structural properties of galaxies across a wide range of redshift. Also, the project to establish the structural properties of bright cluster galaxies up to z ~ 1 using the Hyper Suprime-Cam Subaru Strategic Survey is close to completion.
|
| Strategy for Future Research Activity |
Automated software tools will be run on the JWST NIRCAM imaging in COSMOS-Web to measure the sizes for over 10,000 galaxies up to z ~ 6. This will allow us to establish the relation between galaxy size, mass, and type (star-forming vs. quiescent) over a wide range of cosmic time and as a function of redshift. This work will be incorporated into related studies on the host galaxies which harbor active supermassive black holes. Together, these studies are important for our understanding of the mass buildup of galaxy disks and bulges.
|
