The ALMA-QUARKS Survey: Discovery of Dusty Fibrils inside Massive Star-forming Clumps
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2026
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| author | Zhang, Yan-Kun Liu, Tie Jiao, Wenyu Li, Pak-Shing Zeng, Jia Zhang, Chao García, Pablo Juvela, Mika Garay, Guido Stutz, Amelia M. Dib, Sami Meng, Dezhao Feng, Jian-Cheng Yang, Dongting Xu, Fengwei Tej, Anandmayee Vázquez-Semadeni, Enrique Gómez, Gilberto C. Zhang, Yong Tang, Xindi Goldsmith, Paul F. Kim, Kee-Tae Chibueze, James O. Ren, Zhiyuan Sanhueza, Patricio Yang, Aiyuan Hwang, Jihye Li, Shanghuo Baug, Tapas Gupta, Shivani Das, Swagat R. Wu, Gang Zhou, Jianjun Lee, Chang Won Dewangan, Lokesh Gorai, Prasanta Lyu, Tianning Zhu, Lei |
| author_facet | Zhang, Yan-Kun Liu, Tie Jiao, Wenyu Li, Pak-Shing Zeng, Jia Zhang, Chao García, Pablo Juvela, Mika Garay, Guido Stutz, Amelia M. Dib, Sami Meng, Dezhao Feng, Jian-Cheng Yang, Dongting Xu, Fengwei Tej, Anandmayee Vázquez-Semadeni, Enrique Gómez, Gilberto C. Zhang, Yong Tang, Xindi Goldsmith, Paul F. Kim, Kee-Tae Chibueze, James O. Ren, Zhiyuan Sanhueza, Patricio Yang, Aiyuan Hwang, Jihye Li, Shanghuo Baug, Tapas Gupta, Shivani Das, Swagat R. Wu, Gang Zhou, Jianjun Lee, Chang Won Dewangan, Lokesh Gorai, Prasanta Lyu, Tianning Zhu, Lei |
| contents | We report the discovery of more than 323 superfine dusty filamentary structures (fibrils) inside 121 massive star forming clumps that are located in widely different Galactic environments (Galactocentric distances of $\sim$0.5-12.7 kpc). These fibrils are identified from the 1.3~mm continuum emission in the ALMA-QUARKS survey, which has a linear resolution of $\sim900$ AU for a source at $\sim$3 kpc, using the \textit{FilFinder} software. Using \textit{RadFil} software, we find that the typical width of these fibrils is $\sim$0.01 pc, which is about ten times narrower than that of dusty filaments in nearby clouds identified by the \textit{Herschel} Space Observatory. The mass ($M$) versus length ($L$) relation for these fibrils follows $M\propto L^{2}$, similar to that of Galactic filaments identified in space (e.g., \textit{Herschel}) and ground-based single-dish (e.g., \textit{APEX}) surveys. However, these fibrils are significantly denser ($\mathrm{N_{H_2} = 10^{23}-10^{24}\ cm^{-2}}$) than the filaments found in previous \textit{Herschel} surveys ($\mathrm{N_{H_2} = 10^{20}-10^{23}\ cm^{-2}}$). This work contributes a large sample of superfine fibrils in massive clumps, following the identification of large 0.1-pc wide filaments and associated internal velocity coherent fibers in nearby molecular clouds, further emphasizing the crucial role played by filamentary structures in star formation at various physical scales. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_11617 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | The ALMA-QUARKS Survey: Discovery of Dusty Fibrils inside Massive Star-forming Clumps Zhang, Yan-Kun Liu, Tie Jiao, Wenyu Li, Pak-Shing Zeng, Jia Zhang, Chao García, Pablo Juvela, Mika Garay, Guido Stutz, Amelia M. Dib, Sami Meng, Dezhao Feng, Jian-Cheng Yang, Dongting Xu, Fengwei Tej, Anandmayee Vázquez-Semadeni, Enrique Gómez, Gilberto C. Zhang, Yong Tang, Xindi Goldsmith, Paul F. Kim, Kee-Tae Chibueze, James O. Ren, Zhiyuan Sanhueza, Patricio Yang, Aiyuan Hwang, Jihye Li, Shanghuo Baug, Tapas Gupta, Shivani Das, Swagat R. Wu, Gang Zhou, Jianjun Lee, Chang Won Dewangan, Lokesh Gorai, Prasanta Lyu, Tianning Zhu, Lei Astrophysics of Galaxies Solar and Stellar Astrophysics We report the discovery of more than 323 superfine dusty filamentary structures (fibrils) inside 121 massive star forming clumps that are located in widely different Galactic environments (Galactocentric distances of $\sim$0.5-12.7 kpc). These fibrils are identified from the 1.3~mm continuum emission in the ALMA-QUARKS survey, which has a linear resolution of $\sim900$ AU for a source at $\sim$3 kpc, using the \textit{FilFinder} software. Using \textit{RadFil} software, we find that the typical width of these fibrils is $\sim$0.01 pc, which is about ten times narrower than that of dusty filaments in nearby clouds identified by the \textit{Herschel} Space Observatory. The mass ($M$) versus length ($L$) relation for these fibrils follows $M\propto L^{2}$, similar to that of Galactic filaments identified in space (e.g., \textit{Herschel}) and ground-based single-dish (e.g., \textit{APEX}) surveys. However, these fibrils are significantly denser ($\mathrm{N_{H_2} = 10^{23}-10^{24}\ cm^{-2}}$) than the filaments found in previous \textit{Herschel} surveys ($\mathrm{N_{H_2} = 10^{20}-10^{23}\ cm^{-2}}$). This work contributes a large sample of superfine fibrils in massive clumps, following the identification of large 0.1-pc wide filaments and associated internal velocity coherent fibers in nearby molecular clouds, further emphasizing the crucial role played by filamentary structures in star formation at various physical scales. |
| title | The ALMA-QUARKS Survey: Discovery of Dusty Fibrils inside Massive Star-forming Clumps |
| topic | Astrophysics of Galaxies Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2602.11617 |