Distribution of distant galaxy size and luminosity

遥远星系大小和光度的分布

• 批准号: 22KF0069
• 负责人: SILVERMAN John
• 金额: $ 1.34万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2023
• 资助国家: 日本
• 起止时间: 2023-03-08 至 2024-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22KF0069/
• 关键词: galaxy formation; gravitational waves; JWST

I have used the JSPS Grant-in-Aid to support research on the size-luminosity scaling relation of bright galaxies in the early Universe (i.e., reionization epoch), and understand the mass distribution of the black hole mass-based gravitational wave data. I performed the analysis using the observation data based on the brand-new space telescope JWST. The data is from one of the early release science projects of JWST, and enable us to probe the high redshift galaxy’s morphology and scaling relation for the first time. We found that the size of high redshift galaxies does not vary significantly as a function of wavelength, i.e., from rest-frame UV to optical. We also 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. Furthermore, I also investigated the impact of gravitational lensing on the black hole mass distribution function, and found the current influence from lensing is insignificant. In summary, my main research outcome is the first study of rest-frame optical size-luminosity relation at z>7, and it has made significant contributions understand the galaxy’s morphology and scaling relation in early Universe.

我使用了JSPS补助金来支持早期宇宙中明亮星系的大小-光度标度关系的研究（即，再电离时期），并了解基于黑洞质量的引力波数据的质量分布。我使用基于全新空间望远镜JWST的观测数据进行了分析。这些数据来自JWST早期发布的科学项目之一，使我们能够首次探测高红移星系的形态和标度关系。我们发现，高红移星系的大小并不随波长而显著变化，即，从静止帧UV到光学。我们还检测到一个试探性的陡峭的斜率的大小-光度关系在休息帧的紫外波段，这表明暗星系有非常小的大小。此外，我们还研究了引力透镜效应对黑洞质量分布函数的影响，发现引力透镜效应对当前黑洞质量分布函数的影响并不显著。综上所述，我的主要研究成果是首次研究了z>7时的静止坐标系光学尺寸-光度关系，为理解早期宇宙中星系的形态和标度关系做出了重要贡献。

项目成果

University of California, Los Angeles(米国)

加州大学洛杉矶分校（美国）