A High-mass, Young Star-forming Core Escaping from Its Parental Filament

• Published in: The Astrophysical journal 2023-10, Vol.955 (2), p.104
• Main Authors: Ren, Zhiyuan, Chen, Xi, Liu, Tie, Mannfors, Emma, Bronfman, Leonardo, Xu, Fengwei, Feng, Siyi, Liu, Hongli, Meng, Fanyi, Stutz, Amelia M., Li, Shanghuo, Lee, Chang Won, Wang, Ke, Zhou, Jianwen, Li, Di, Wang, Chen, Eswaraiah, Chakali, Tej, Anandmayee, Chen, Long-Fei, Shi, Hui
• Format: Article
• Language: English
• Subjects: Astrophysics; Dense interstellar clouds; Gravitational collapse; Interstellar filaments; Kinematics; Kinetic energy; Magnetic fields; Radio telescopes; Star formation; Stars & galaxies; Tracers; Young stellar objects
• ISSN: 0004-637X; 1538-4357
• DOI: 10.3847/1538-4357/aced54

We studied the unique kinematic properties in massive filament G352.63-1.07 at 10 3 au spatial scale with the dense molecular tracers observed with the Atacama Large Millimeter/submillimeter Array. We find the central massive core M1 (12 M ⊙ ) being separated from the surrounding filament with a velocity difference of v − v ¯ sys = − 2 km s − 1 and a transverse separation within 3″. Meanwhile, as shown in multiple dense-gas tracers, M1 has a spatial extension closely aligned with the main filament and is connected to the filament toward both its ends. M1 thus represents a very beginning state for a massive, young star-forming core escaping from the parental filament, within a timescale of ∼4000 yr. Based on its kinetic energy (3.5 × 10 44 erg), the core escape is unlikely solely due to the original filament motion or magnetic field but requires more energetic events such as a rapid intense anisotropic collapse. The released energy also seems to noticeably increase the environmental turbulence. This may help the filament to become stabilized again.