A High-mass, Young Star-forming Core Escaping from Its Parental Filament
Abstract
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. We find the central massive core M1 (12 M ⊙) being separated from the surrounding filament with a velocity difference of $v-{\overline{v}}_{\mathrm{sys}}=-2\,\mathrm{km}\,{{\rm{s}}}^{-1}$ 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 × 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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 2023
- DOI:
- 10.3847/1538-4357/aced54
- arXiv:
- arXiv:2310.08180
- Bibcode:
- 2023ApJ...955..104R
- Keywords:
-
- Star formation;
- Young stellar objects;
- Dense interstellar clouds;
- Interstellar filaments;
- Gravitational collapse;
- 1569;
- 1834;
- 371;
- 842;
- 662;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 15 pages, 6 figures, accepted for publication in the Astrophysical Journal