We studied the unique kinematic properties in massive filament G352.63-1.07 at 103-AU spatial scale with the dense molecular tracers observed with the Atacama Large Millimeter/submillimeter Array (ALMA). We find the central massive core M1 (12 M⊙) being separated from the surrounding filament with a velocity difference of v−vsys=−2 km/s and a transverse separation within 3 arcsec. 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 towards its both ends. M1 thus represents a very beginning state for a massive young star-forming core escaping from the parental filament, within a time scale of ∼4000 years. Based on its kinetic energy (3.5×1044 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.
@article{arxiv.2310.08180,
title = {A High-Mass Young Star-forming Core Escaping from Its Parental Filament},
author = {Zhiyuan Ren and Xi Chen and Tie Liu and Emma Mannfors and Leonardo Bronfman and Fengwei Xu and Siyi Feng and Hongli Liu and Fanyi Meng and Amelia. M. Stutz and Shanghuo Li and Chang Won Lee and Ke Wang and Jianwen Zhou and Di Li and Chen Wang and Chakali Eswaraiah and Anandmayee Tej and Long-Fei Chen and Hui Shi},
journal= {arXiv preprint arXiv:2310.08180},
year = {2023}
}
Comments
15 pages, 6 figures, accepted for publication in the Astrophysical Journal