Cloud-Cloud Collision: Formation of Hub-Filament Systems and Associated Gas Kinematics; Mass-collecting cone: A new signature of Cloud-Cloud Collision

• DOI: 10.48550/arxiv.2408.06826
• Publication Date: 2024-08-13
• Authors: A. K. Maity; Tsuyoshi Inoue; Y. Fukui; L. K. Dewangan; H. Sano; Rin I Yamada; Kengo Tachihara; N. K. Bhadari; O. R. Jadhav
• Keywords: Signature (topology); Cone (formal languages)

Massive star-forming regions (MSFRs) are commonly associated with hub-filament systems (HFSs) and sites of cloud-cloud collision (CCC). Recent observational studies some MSFRs suggest a possible connection between CCC the formation HFSs. To understand this connection, we analyzed magneto-hydrodynamic simulation data from Inoue et al. (2018). This involves spherical turbulent molecular cloud plane-parallel sea dense gas at relative velocity about 10 km/s. Following collision, non-uniform undergoes shock compression, rapidly developing filamentary structures within compressed layer. We found that can lead to HFSs, which is combined effect turbulence, magnetic field, gravity. The components shapes filaments into cone drives inward flows among them. These merge vertex cone, accumulating high-density gas, massive star(s). acts as mass-collecting machine, involving non-gravitational early process filament formation, followed by gravitational attraction finalize HFS. distribution in position-velocity (PV) position-position spaces highlights challenges detecting two confirming their complementary if colliding clouds have large size difference. However, such events be confirmed PV diagrams presenting flow toward hosts gravitationally collapsing objects, field morphology curved direction collision.