AI 中文总结
本研究在GOODS-North天区通过dropout技术结合色选，新发现327个红移1.6≤z≤3.0的莱曼断裂星系候选体，经分析确认其为低至中等质量的致密盘状星系，为星系演化研究提供了新样本。
AI 中文摘要
莱曼断裂星系（Lyman Break Galaxies, LBGs）是通过其特征静止帧紫外光谱断裂识别出的活跃恒星形成星系，是探测宇宙不同时期星系演化的强大探针。我们利用3D-HST数据的 dropout 技术结合色选方法，在GOODS-North天区搜寻红移1.6≤z≤3.0的LBGs。我们采用两个选择判据，通过F275W和F336W dropout识别z~2.1和z~2.7的LBG候选体，在红移范围1.6≤z≤2.3和2.3<z≤3.0中分别得到192个和135个新发现的LBG候选体。我们通过光谱能量分布（SED）拟合估算LBG候选体的物理性质，包括恒星年龄、恒星质量和恒星形成率（SFR）。形态分析显示，样本中大部分星系呈现盘状结构。总体结果表明，这些LBGs是低到中等质量的致密星系，有效半光半径约为3.5千秒差距（kpc）。
英文摘要
Lyman Break Galaxies (LBGs) are actively star-forming galaxies identified through their characteristic rest-frame ultraviolet spectral break, making them powerful probes of galaxy evolution across cosmic time. We present a search for LBGs at redshifts $1.6 \leq z \leq 3.0$ in the GOODS-North field using the dropout technique combined with color selection from the 3D-HST data. We utilize two selection criteria to identify LBG candidates at $z \sim 2.1$ and $z \sim 2.7$ via F275W- and F336W-dropouts, yielding 192 and 135 newly identified LBG candidates in the redshift ranges $1.6 \leq z \leq 2.3$ and $2.3 < z \leq 3.0$, respectively. We estimate the physical properties of the LBG candidates, including stellar age, stellar mass, and star formation rate (SFR), using spectral energy distribution (SED) fitting. Morphological analysis shows that the majority of galaxies in our sample exhibit disc-like structures. Overall, the results indicate that these LBGs are low- to intermediate-mass compact galaxies with effective half-light radii of approximately 3.5 kpc.
Comments8 pages, 5 figures, Presented at BINA2025 conference, Accepted in Bulletin of Liège Royal Society of Sciences
