AI 中文总结
本研究基于ALMA的ACES巡天数据，生成CMZ的致密连续源完整与过滤星表，发现大量未被识别的潜在恒星形成源，为研究CMZ恒星形成提供了关键样本。
AI 中文摘要
银心分子区（CMZ）位于银河系内部数百秒差距处，尽管它是银河系中致密分子气体的最大储库，但其当前恒星形成率（SFR）相对较低，约为0.08 M⊙ yr⁻¹。阿塔卡马大型毫米波/亚毫米波阵列（ALMA）CMZ探索巡天（ACES）的连续谱和谱线观测，提供了CMZ内部200秒差距区域首个全覆盖、高分辨率的3毫米波段图。本文介绍ACES致密连续源星表，这是迄今为止CMZ中最完整的潜在恒星形成位点星表。我们结合自动树状图源提取程序与目视形态分类方案，生成包含总计1735个探测源的“完整”星表；此外，我们利用谱指数测量生成“过滤后”星表，包含567个受非热纤维和延展自由-自由发射污染最小的源。我们发现，过滤后星表中359个（约63%）源的柱密度小于10²³ cm⁻²，位于最致密分子云区域之外，其中195个源在以往巡天中未被识别。通过与不同波长数据生成的各类星表交叉比对，我们认为这些新发现的探测源很可能由前恒星/原恒星源或致密HII区产生。
英文摘要
The Central Molecular Zone (CMZ) resides in the inner few hundred parsecs of our Galaxy, and despite being the largest reservoir of dense molecular gas in the Milky Way, it has a relatively low present-day star formation rate (SFR) of $\sim0.08~M_{\odot}~\text{yr}^{-1}$. Continuum and spectral line observations from the Atacama Large Millimeter/submillimeter Array (ALMA) CMZ Exploration Survey (ACES) provide the first full-coverage, high-resolution map of the inner 200 parsecs of the CMZ at 3 mm. In this paper we present the ACES catalog of compact continuum sources, the most complete catalog of potential sites of star formation in the CMZ to date. Using an automated dendrogram-based source extraction procedure in combination with a by-eye morphological classification scheme, we produce a `full' catalog of 1735 detections in total. Additionally, we use spectral index measurements to generate a `filtered' catalog of 567 sources with minimal contamination from non-thermal filaments and extended free-free emission. We find that 359 ($\sim63\%$) of the filtered catalog sources are located at column densities $< 10^{23}$ cm$^{-2}$, outside of the densest molecular cloud regions, 195 of which have not been identified in previous surveys. After cross-referencing with various catalogs generated from data at different wavelengths, we consider it likely that many of these newly discovered detections are produced by pre/protostellar sources or compact HII regions.
Comments25 pages, 11 figures, accepted for publication in the Astrophysical Journal
