부산대학교 도서관

We present a comprehensive search and analysis of high-redshift galaxies in a suite of nine public JWST extragalactic fields taken in Cycle 1, covering a total effective search area of $\sim 358\,{\mathrm{arcmin}}^{2}$ . Through conservative (8 σ ) photometric selection, we identify 341 galaxies at 5 < z < 14, with 109 having spectroscopic redshift measurements from the literature, including recent JWST NIRSpec observations. Our regression analysis reveals that the rest-frame UV size–stellar mass relation follows ${R}_{\mathrm{eff}}\propto {M}_{* }^{0.19\pm 0.03}$ , similar to that of star-forming galaxies at z ∼ 3, but scaled down in size by ∼0.7 dex. We find a much slower rate for the average size evolution over the redshift range, R _eff ∝ (1 + z ) ^−0.4±0.2 , than that derived in the literature. A fraction (∼13%) of our sample galaxies are marginally resolved even in the NIRCam imaging (≲100 pc), located at ≳1.5 σ below the derived size–mass slope. These compact sources exhibit a high star formation surface density Σ _SFR > 10 M _⊙ yr ^−1 kpc ^−2 , a range in which only