Distribution of distant galaxy size and luminosity

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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.