GLOW I：近邻宇宙中富气体、恒星形成的低质量星系的综合测量
GLOW I: Comprehensive Measurements of Gas-Rich, Star-Forming, Low-Mass Galaxies in the Nearby Universe
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中文总结 AI 辅助
GLOW项目的I部分构建了6兆秒差距内37个低质量富气体恒星形成星系的多波段综合星表，完成相关测量，为研究其恒星形成与化学增丰循环奠定基础。
中文摘要 AI 辅助
近邻宇宙中富气体、恒星形成的低质量星系是详细研究重子物理的强大实验室，涵盖恒星质量组装、恒星反馈、化学增丰以及星际介质与恒星形成的相互作用等内容。研究这些不同却相互关联的过程需要多个天文台获取的数据。在此，我们展示了一个包含6兆秒差距内37个低质量星系的统一处理数据的综合星表。该星表包含以下存档数据：（i）甚大天线阵（Very Large Array）观测的中性氢（HI）数据；（ii）哈勃空间望远镜（Hubble Space Telescope）光学成像的分辨恒星数据；（iii）斯皮策空间望远镜（Spitzer Space Telescope）3.6微米成像数据；（iv）地面望远镜的光学成像数据。我们还汇编了以下测量结果：（i）星系的红巨星支顶端（tip-of-the-red-giant-branch，TRGB）距离；（ii）直接法得到的气相氧丰度与氮氧丰度比；（iii）每个星系周边局部环境的约束；（iv）文献中的其他测量结果。我们在需要时补充新的观测，以完成样本中所有星系的测量。从这些数据中，我们发现色-星等图测量的恒星质量与通过假设质光比从3.6微米成像估计的恒星质量吻合良好。我们还提供了首个中性氢（HI）轮廓随结构参数变化的映射图。这些数据集和测量结果是“通过风损失氧的星系（Galaxies Losing Oxygen via Winds，GLOW）”项目的基础，该项目的主要目标是通过逐个星系测量氧的产生、分布和留存情况，表征低质量星系的恒星形成-化学增丰循环。
英文摘要
Gas-rich, star-forming, low-mass galaxies in the nearby universe are powerful laboratories for studying baryonic physics in detail including: stellar mass assembly, stellar feedback, chemical enrichment, and the interplay of the interstellar medium with star formation. Investigating these disparate yet interconnected processes requires data obtained by myriad observatories. Here, we present a comprehensive atlas of uniformly processed data on 37 low-mass galaxies within 6 Mpc. The atlas includes archival data on (i) the HI from the Very Large Array observatory; (ii) resolved stars from Hubble Space Telescope optical imaging; (iii) Spitzer Space Telescope 3.6 micron imaging; and (iv) optical imaging from ground-based telescopes. We also compile measurements of (i) tip-of-the-red-giant-branch (TRGB) distances to the galaxies; (ii) direct method gas-phase oxygen abundances and nitrogen to oxygen abundance ratios; (iii) constraints on the local environment around each galaxy; and (iv) other measurements from the literature. We supplement the data with new observations where needed to complete the measurements for all galaxies in the sample. From these data, we find good agreement between stellar masses measured from color-magnitude diagrams and those estimated from 3.6 micron imaging by assuming a mass-to-light ratio. We also provide the first mapping of the HI profiles as a function of structural parameters. These data sets and measurements are the foundation for the Galaxies Losing Oxygen via Winds (GLOW) project whose main aim is to characterize the star formation - chemical enrichment cycle of low-mass galaxies by measuring the production, distribution, and retention of oxygen on a galaxy-by-galaxy basis.
