2025-11-19 中国科学院（CAS）
Distribution of the two elongated filamentary structures (shown in blue and red) in F-NE. (Image by XAO)
＜関連情報＞
- https://english.cas.cn/newsroom/research_news/phys/202511/t20251114_1115573.shtml
- https://iopscience.iop.org/article/10.3847/1538-4357/ae12f4
AGAL323.444+0.096と星形成に関連する2つの細長いフィラメントの合体の証拠 Evidences of Two Merging Elongated Filaments Associated with AGAL323.444+0.096 and Star Formation
Yingxiu Ma, Jianjun Zhou, Jarken Esimbek, Dalei Li, Andrej M. Sobolev, Xindi Tang, Willem Baan, Gang Wu, Macleod Gordon, Yuxin He,…
The Astrophysical Journal Published: 2025 November 19
DOI:10.3847/1538-4357/ae12f4
Abstract
We study the structure, kinematics, and star-forming activity of filamentary cloud F-NE associated with AGAL323.444+0.096 using 13CO (J = 2–1) molecular line and continuum data from the far-infrared to near-infrared. The cloud comprises two elongated subfilaments, F-NE-north and F-NE-south, each spanning 25 pc, with systemic velocities of −65.25 and −67.38 km s−1, respectively. F-NE-north and F-NE-south seem to be merging by collision. They exhibit signatures of cloud–cloud collisions, including U-shaped and arc-like morphologies, complementary components, and bridge features, suggesting ongoing collisions. The interacting zones show enhanced column densities and elevated velocity dispersion, further supporting the collision scenario. All these features are consistent with the “fray and gather” model. Dense clumps and young stellar objects are predominantly concentrated in these collision regions, implying that filament merging and localized collisions drive the formation of massive dusty clumps capable of nurturing massive stars. These results demonstrate that filament merging by collision is crucial for both filament structural evolution and the formation of massive stars and clusters.
