Cloud-cloud collision and star formation in G013.313+0.193
We study the G013.313+0.193 (G013.313) region, a complex environment characterised by molecular cloud interactions indicative of cloud-cloud collision (CCC). Observations of the NH 3 (1,1) and (2,2) inversion transitions were obtained using the Nanshan 26 m radio telescope, while HCO + ( J = 1–0), 12 CO, 13 CO, and C 18 O ( J = 1–0) transitions from the 14 m Purple Mountain Observatory Delingha (PMODLH) 14 m telescope. Archival data are also included. We identified key observational signatures of CCC, including complementary spatial distributions, U-shaped structures, bridge features, and V-shaped velocity distributions. The position–velocity (P–V) diagrams reveal clear indications of gas interaction between two velocity components, suggesting an ongoing collision at an estimated angle of ∼ 45° to the line of sight. The estimated collision timescale is 0.35–1.03 Myr, aligned with the inferred ages of young stellar objects (YSOs) in the region, supporting the hypothesis of collision-induced star formation. Hub-filament systems (HFSs) are identified in the compressed gas region, where filaments converge towards a dense hub, suggesting the CCC as a potential driver of HFS and massive star formation. The high column density (∼2 × 10 23 cm −2 ) suggests favourable conditions for the formation of massive stars. Although alternative kinematic drivers such as longitudinal collapse and shear motion are considered, CCC remains the most plausible explanation for the observed features. Our findings contribute to our understanding of the mechanisms of cloud dynamics and massive star formation in turbulent molecular environments.
Authors
- Xindi Tang (ORCID: https://orcid.org/0000-0002-4154-4309)
- Qaynar Jandaolet
- Gang Wu (ORCID: https://orcid.org/0000-0003-0933-7112)
- Jarken Esimbek (ORCID: https://orcid.org/0000-0003-4910-1390)
- Wenjun Zhang (ORCID: https://orcid.org/0009-0006-5987-5487)
- Yuxin He (ORCID: https://orcid.org/0000-0002-8760-8988)
- Yingxiu Ma (ORCID: https://orcid.org/0000-0002-0776-0753)
- Kadirya Tursun
- Toktarkhan Komesh (ORCID: https://orcid.org/0000-0002-3415-4636)
- Jianjun Zhou (ORCID: https://orcid.org/0000-0003-0356-818X)
- A.B. Manapbayeva (ORCID: https://orcid.org/0000-0002-0322-1509)
- Ernazar Abdikamalov (ORCID: https://orcid.org/0000-0001-5481-7727)
- Dongdong Zhou (ORCID: https://orcid.org/0000-0003-4644-8110)
- C. Henkel (ORCID: https://orcid.org/0000-0002-7495-4005)
- Dilda Berdikhan (ORCID: https://orcid.org/0000-0001-7629-7099)
- Ernar Imanaly
- Duriya Tuiakbayeva
- Dejian Liu (ORCID: https://orcid.org/0000-0002-9544-4223)
- Hailiang Shen (ORCID: https://orcid.org/0009-0000-2437-1920)
- Ye Xu (ORCID: https://orcid.org/0000-0001-5602-3306)
Institutions
- China Three Gorges University (CN)
- King Abdulaziz University (SA)
- Al-Farabi Kazakh National University (KZ)
- Chinese Academy of Sciences (CN)
- Xinjiang Astronomical Observatory (CN)
- Purple Mountain Observatory (CN)
- Kokshetau State University (KZ)
- Max Planck Institute for Radio Astronomy (DE)
- Beijing Chaoyang Emergency Medical Center (CN)
- University of Chinese Academy of Sciences (CN)
- Nazarbayev University (KZ)
Publication Details
- Journal
- Astronomy and Astrophysics
- Published
- 2025-05-28
- DOI
- https://doi.org/10.1051/0004-6361/202453285
- Citations
- 4
- Primary Topic
- Astrophysics and Star Formation Studies
- Type
- article
- Field-Weighted Citation Impact
- 4.62
Funders
- Natural Science Foundation of Xinjiang Province
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- Youth Innovation Promotion Association of the Chinese Academy of Sciences
- Natural Science Foundation of Xinjiang
- National Key Research and Development Program of China
- Youth Innovation Promotion Association