The ALMA-QUARKS Survey: Fibers' role in star formation unveiled in an intermediate-mass protocluster region of the Vela D cloud
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| author | Yang, Dongting Liu, HongLi Liu, Tie Tej, Anandmayee Liu, Xunchuan He, Jinhua Garay, Guido Stutz, Amelia Zhu, Lei Qin, Sheng-Li Xu, Fengwei Li, Pak-Shing Juvela, Mika Garcia, Pablo Goldsmith, Paul F. Zhang, Siju Tang, Xindi Sanhueza, Patricio Li, Shanghuo Lee, Chang Won Das, Swagat Ranjan Jiao, Wenyu Mai, Xiaofeng Gorai, Prasanta Zhang, Yichen Ren, Zhiyuan Toth, L. Viktor Hwang, Jihye Bronfman, Leonardo Tatematsu, Kenichi Dewangan, Lokesh Chibueze, James O. Zhang, Suinan Wu, Gang Xie, Jinjin |
| author_facet | Yang, Dongting Liu, HongLi Liu, Tie Tej, Anandmayee Liu, Xunchuan He, Jinhua Garay, Guido Stutz, Amelia Zhu, Lei Qin, Sheng-Li Xu, Fengwei Li, Pak-Shing Juvela, Mika Garcia, Pablo Goldsmith, Paul F. Zhang, Siju Tang, Xindi Sanhueza, Patricio Li, Shanghuo Lee, Chang Won Das, Swagat Ranjan Jiao, Wenyu Mai, Xiaofeng Gorai, Prasanta Zhang, Yichen Ren, Zhiyuan Toth, L. Viktor Hwang, Jihye Bronfman, Leonardo Tatematsu, Kenichi Dewangan, Lokesh Chibueze, James O. Zhang, Suinan Wu, Gang Xie, Jinjin |
| contents | In this paper, we present a detailed analysis of the IRS 17 filament within the intermediate-mass protocluster IRAS 08448-4343 (of $\sim\,10^3\,\rm L_{\odot}$), using ALMA data from the ATOMS 3-mm and QUARKS 1.3-mm surveys. The IRS 17 filament, which spans $\sim$54000 au ($0.26\,\rm pc$) in length and $\sim$4000 au ($0.02\,\rm pc$) in width, exhibits a complex, multi-component velocity field, and harbours hierarchical substructures. These substructures include three bundles of seven velocity-coherent fibers, and 29 dense ($n\sim 10^8\,\rm cm^{-3}$) condensations. The fibers have a median length of $\sim 4500\,\rm au$ and a median width of $\sim 1400\,\rm au$. Among these fibers, four are identified as ``fertile", each hosting at least three dense condensations, which are regarded as the ``seeds" of star formation. While the detected cores are randomly spaced within the IRS\,17 filament based on the 3-mm dust continuum image, periodic spacing ($\sim1600\,\rm au$) of condensations is observed in the fertile fibers according to the 1.3-mm dust map, consistent with the predictions of linear isothermal cylinder fragmentation models. These findings underscore the crucial role of fibers in star formation and suggest a hierarchical fragmentation process that extends from the filament to the fibers, and ultimately, to the smallest-scale condensations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_15333 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The ALMA-QUARKS Survey: Fibers' role in star formation unveiled in an intermediate-mass protocluster region of the Vela D cloud Yang, Dongting Liu, HongLi Liu, Tie Tej, Anandmayee Liu, Xunchuan He, Jinhua Garay, Guido Stutz, Amelia Zhu, Lei Qin, Sheng-Li Xu, Fengwei Li, Pak-Shing Juvela, Mika Garcia, Pablo Goldsmith, Paul F. Zhang, Siju Tang, Xindi Sanhueza, Patricio Li, Shanghuo Lee, Chang Won Das, Swagat Ranjan Jiao, Wenyu Mai, Xiaofeng Gorai, Prasanta Zhang, Yichen Ren, Zhiyuan Toth, L. Viktor Hwang, Jihye Bronfman, Leonardo Tatematsu, Kenichi Dewangan, Lokesh Chibueze, James O. Zhang, Suinan Wu, Gang Xie, Jinjin Astrophysics of Galaxies In this paper, we present a detailed analysis of the IRS 17 filament within the intermediate-mass protocluster IRAS 08448-4343 (of $\sim\,10^3\,\rm L_{\odot}$), using ALMA data from the ATOMS 3-mm and QUARKS 1.3-mm surveys. The IRS 17 filament, which spans $\sim$54000 au ($0.26\,\rm pc$) in length and $\sim$4000 au ($0.02\,\rm pc$) in width, exhibits a complex, multi-component velocity field, and harbours hierarchical substructures. These substructures include three bundles of seven velocity-coherent fibers, and 29 dense ($n\sim 10^8\,\rm cm^{-3}$) condensations. The fibers have a median length of $\sim 4500\,\rm au$ and a median width of $\sim 1400\,\rm au$. Among these fibers, four are identified as ``fertile", each hosting at least three dense condensations, which are regarded as the ``seeds" of star formation. While the detected cores are randomly spaced within the IRS\,17 filament based on the 3-mm dust continuum image, periodic spacing ($\sim1600\,\rm au$) of condensations is observed in the fertile fibers according to the 1.3-mm dust map, consistent with the predictions of linear isothermal cylinder fragmentation models. These findings underscore the crucial role of fibers in star formation and suggest a hierarchical fragmentation process that extends from the filament to the fibers, and ultimately, to the smallest-scale condensations. |
| title | The ALMA-QUARKS Survey: Fibers' role in star formation unveiled in an intermediate-mass protocluster region of the Vela D cloud |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2410.15333 |