| Name: | Arup Kumar Maity |
| Affiliation: | Physical Research Laboratory |
| Conference ID : | ASI2024_341 |
| Title : | From Collision to Creation: Origin of Hub-Filament Systems through Cloud-Cloud Collision |
| Authors : | Arup Kumar Maity 1 2, Rin Yamada 3, Takahiro Hayakawa 3, Yasuo Fukui 3, and Lokesh Kumar Dewangan 1
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| Authors Affiliation: | 1 Physical Research Laboratory, Navrangpura, Ahmedabad 380009, India
2 Indian Institute of Technology Gandhinagar, Palaj, Gandhinagar 382355, India
3 Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan |
| Mode of Presentation: | Poster |
| Abstract Category : | Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Abstract : | While massive star-forming regions (MSFRs) are commonly associated with hub-filament systems (HFSs) and the sites of cloud-cloud collision (CCC), the connection between HFS and CCC has been notably absent in the existing literature. Our recent investigations on Galactic MSFRs, such as the W31 complex and AFGL 5180, have revealed concurrent indications of HFSs and CCCs, suggesting the intriguing possibility that CCCs may play a role in forming HFSs. In this context, we conducted an extensive examination of a shock-compressed layer, utilizing numerical magneto-hydrodynamic simulations data from Inoue et al. 2018, 70(SP2), S53(1-11). These simulations involve the collision of molecular clouds at a relative velocity of approximately 10 km/s with a spatial resolution of roughly 2500 AU. Our preliminary findings indicate the expansion of the shock-compressed layer in terms of increased width and density over time. Following the collision, the turbulent and non-uniform cloud undergoes compression due to the shock wave and magnetic fields, resulting in the rapid development of filamentary structures within the compressed interface. We observed the emergence of a complex network of filaments with multiple junctions, becoming more concentrated toward the central region in the later stages of the evolution. Interestingly, filament collisions are unlikely to be responsible for forming hub-filament systems in our current setup. Furthermore, gravity, while not the
exclusive driving force behind the formation of this intricate network of filaments, plays a significant role in increasing the line-mass of the filaments and the total mass of the hubs. This effect, in turn, promotes the formation of massive stars. As a result, our initial observations suggest that a combined influence of turbulence, gravity, and magnetic fields within colliding clouds contributes to creating HFSs and, subsequently, the birth of massive stars. During this presentation, I will share these early research outcomes. |
