An S-shaped Filament Formed Due to Cloud–Cloud Collision in Molecular Cloud G178.28-00.61
Abstract We present compelling observational evidence supporting G178.28-00.61 as an early-stage candidate for cloud–cloud collision (CCC), with indications of the formation of an S-shaped filament, evenly separated dense cores, and young star clusters. The observations of CO molecular line emission demonstrate the existence of two interacting molecular clouds with systemic velocities of 0.8 km s −1 and −1.2 km s −1 , respectively. The convergence zone of these two clouds reveals an S-shaped filament in the James Clerk Maxwell Telescope 850 μ m continuum image, suggesting cloud interaction. In line with expectations from CCC simulations, broad bridging features are discernible in the position–velocity diagrams. An elevated concentration of identified Class I and II young stellar objects along the filament at the intersection area further supports the hypothesis of a collision-induced origin. This observation could be explained by a recent MHD model of CCC, which predicts a similar morphology, scale, density, and unbound status, as well as the orientation of the polarization.
Authors
- H. J. Fraser (ORCID: https://orcid.org/0000-0003-0972-1595)
- Tie Liu (ORCID: https://orcid.org/0000-0002-5286-2564)
- D. Ward–Thompson (ORCID: https://orcid.org/0000-0003-1140-2761)
- Xunchuan Liu (ORCID: https://orcid.org/0000-0001-8315-4248)
- Fengwei Xu (ORCID: https://orcid.org/0000-0001-5950-1932)
- G. J. White (ORCID: https://orcid.org/0000-0002-7126-691X)
- Yasuo Doi (ORCID: https://orcid.org/0000-0001-8746-6548)
- Chang Won Lee (ORCID: https://orcid.org/0000-0002-3179-6334)
- Sihan Jiao (ORCID: https://orcid.org/0000-0002-9151-1388)
- P. F. Goldsmith (ORCID: https://orcid.org/0000-0002-6622-8396)
- Linjing Feng
- A. Traficante (ORCID: https://orcid.org/0000-0003-1665-6402)
- Donghui Quan (ORCID: https://orcid.org/0000-0003-4811-2581)
- Doug Johnstone (ORCID: https://orcid.org/0000-0002-6773-459X)
- James Di Francesco (ORCID: https://orcid.org/0000-0002-9289-2450)
- L. Bronfman (ORCID: https://orcid.org/0000-0002-9574-8454)
- Yuefang Wu (ORCID: https://orcid.org/0000-0002-5076-7520)
- Yi‐Jehng Kuan (ORCID: https://orcid.org/0000-0002-4336-0730)
- Tianwei Zhang (ORCID: https://orcid.org/0000-0002-1466-3484)
- Ram Kesh Yadav (ORCID: https://orcid.org/0000-0002-6740-7425)
Institutions
- Herzberg Institute of Astrophysics (CA)
- Rutherford Appleton Laboratory (GB)
- Jet Propulsion Laboratory (US)
- National Taiwan Normal University (TW)
- University of Lancashire (GB)
- Chinese Academy of Sciences (CN)
- Peking University (CN)
- The Open University (GB)
- University of Victoria (CA)
- Shanghai Astronomical Observatory (CN)
- Korea Astronomy and Space Science Institute (KR)
- Institute for Space Astrophysics and Planetology (IT)
- Kavli Institute for Theoretical Sciences (CN)
- Max Planck Institute for Astronomy (DE)
- Zhejiang Lab (CN)
- National Astronomical Observatories (CN)
- University of Chinese Academy of Sciences (CN)
- University of Chile (CL)
- The University of Tokyo (JP)
- National Astronomical Research Institute of Thailand (TH)
Publication Details
- Journal
- The Astrophysical Journal Supplement Series
- Published
- 2025-08-25
- DOI
- https://doi.org/10.3847/1538-4365/adf203
- Primary Topic
- Astrophysics and Star Formation Studies
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Aeronautics and Space Administration
- California Institute of Technology
- National Astronomical Research Institute of Thailand
- National Natural Science Foundation of China
- Academia Sinica
- Chinese Academy of Sciences
- China Postdoctoral Science Foundation
- Korea Astronomy and Space Science Institute
- National Astronomical Observatory of Japan
- Thailand Science Research and Innovation
- Agencia Nacional de Investigación y Desarrollo
- Jet Propulsion Laboratory
- University of California, Los Angeles
- Natural Sciences and Engineering Research Council of Canada
- National Key Research and Development Program of China