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线性丝状体与嵌套星团演化断层成像（LANCET）I. 捕捉14 parsec丝状体G316.8中密集气体的演化

Linear filament and nested cluster evolution tomography (LANCET) I. Capture the evolution of dense gas in 14-parsec filament G316.8

Kavli Institute for Astronomy and Astrophysics, Peking University（北京大学科维理天文与天体物理研究所）；Max Planck Institute for Astronomy（马克斯·普朗克天文学研究所）；I. Physikalisches Institut, Universität zu Köln（科隆大学第一物理研究所）；Instituto de Radioastronomía y Astrofísica, Universidad Nacional Autónoma de México（墨西哥国立自治大学无线电天文学与天体物理研究所）；SRON Netherlands Institute for Space Research & Kapteyn Astronomical Institute, University of Groningen（荷兰空间研究研究所与格罗宁根大学卡普坦天文学研究所）；Department of Astronomy, University of Florida（佛罗里达大学天文学系）；Department of Astronomy, University of Virginia（弗吉尼亚大学天文学系）；Department of Space, Earth & Environment, Chalmers University of Technology（查尔姆斯理工大学空间、地球与环境系）；Department of Physics, National Sun Yat-Sen University（国立中山大学物理系）；Center of Astronomy and Gravitation, National Taiwan Normal University（国立台湾师范大学天文与引力研究中心）
Fengwei Xu, Ke Wang, Nicola Schneider, Roberto Galván-Madrid, Floris F. S. van der Tak, Adam Ginsburg, Jonathan C. Tan, Hauyu Baobab Liu, Qizhou Zhang, Wenyu Ji… 展开作者

Fengwei Xu, Ke Wang, Nicola Schneider, Roberto Galván-Madrid, Floris F. S. van der Tak, Adam Ginsburg, Jonathan C. Tan, Hauyu Baobab Liu, Qizhou Zhang, Wenyu Jiao, Guido Garay, Sihan Jiao, Keyun Su, Beth M. Jones, Lei Zhu

备注：
12 pages, 8 figures. Accepted for publication in A&A
发表信息：
A&A 708, A251 (2026)
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AI总结：

通过LANCET项目，利用阿塔卡马紧凑阵列在1.3毫米波段对G316.8丝状体进行成像，结合赫尔墨斯和APEX/ArTéMiS数据，研究了从红外暗云到HII区域的密集气体演化过程，揭示了碎片质量和密度分布的变化。

摘要：

通过LANCET项目，利用阿塔卡马紧凑阵列在1.3毫米波段对G316.8丝状体进行成像，结合赫尔墨斯和APEX/ArTéMiS数据，研究了从红外暗云到HII区域的密集气体演化过程，揭示了碎片质量和密度分布的变化。

英文摘要：

A dynamic view of mass assembly is essential for understanding the formation of massive stars and clusters. Interpreting evolutionary diagnostics from Galactic-wide surveys, however, requires careful control of distance and environmental variations. The G316.8 filament provides an ideal laboratory: a 14-pc nearly linear structure composed of three contiguous subregions with comparable molecular gas reservoirs (~10,000 $M_\odot$ each) but spanning a clear evolutionary sequence from an infrared dark cloud (young) through a massive young stellar object (intermediate) to an HII region (evolved). As part of the Linear filament and nested cluster evolution tomography (LANCET) project, we mapped the full filament with the Atacama Compact Array at 1.3 mm, achieving 0.08 pc resolution over 17.1 pc$^2$. Combined with Herschel and APEX/ArTéMiS data, we derived high-resolution temperature and column-density maps. We quantify structural evolution using dense-fragment statistics, column-density PDFs, and $Δ$-variance analysis. From young to evolved regions, the maximum fragment mass increases from 8 to 490 $M_\odot$, while the dense-gas mass fraction ($>0.5$ g cm$^{-2}$) rises from 0.4% to 9.6%. The N-PDF develops a secondary power-law tail and the $Δ$-variance slope becomes progressively shallower, indicating ongoing assembly of dense sub-parsec structures. Our further ALMA 12m continuum and spectral line data will extend this dynamic scenarios down to 800 AU scale.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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