A misaligned protostellar disk fed by gas streamers in a barred spiral-like massive dense core
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| Format: | Preprint |
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2025
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| _version_ | 1866911163363622912 |
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| author | Mai, Xiaofeng Liu, Tie Liu, Xunchuan Zhang, Bo Goldsmith, Paul F. Evans II, Neal J. Zhang, Qizhou Kim, Kee-Tae Yang, Dongting Juvela, Mika Xu, Fengwei Jiao, Wenyu Liu, Hongli Sanhueza, Patricio Garay, Guido Chen, Xi Qin, Shengli Vorster, Jakobus M. Tej, Anandmayee Ren, Zhiyuan Dib, Sami Li, Shanghuo Luo, Qiuyi Hwang, Jihye Gorai, Prasanta Hoque, Ariful Zhang, Yichen Lee, Jeong-Eun Zhang, Siju Mannfors, Emma Tharakkal, Devika Dewangan, Lokesh Bronfman, Leonardo Garcia, Pablo Tang, Xindi Das, Swagat R. Wu, Gang Lee, Chang-Won Chibueze, James O. Zhang, Yankun Gu, Qilao Tatematsu, Kenichi Wang, Guangli Zhu, Lei Shen, Zhiqiang |
| author_facet | Mai, Xiaofeng Liu, Tie Liu, Xunchuan Zhang, Bo Goldsmith, Paul F. Evans II, Neal J. Zhang, Qizhou Kim, Kee-Tae Yang, Dongting Juvela, Mika Xu, Fengwei Jiao, Wenyu Liu, Hongli Sanhueza, Patricio Garay, Guido Chen, Xi Qin, Shengli Vorster, Jakobus M. Tej, Anandmayee Ren, Zhiyuan Dib, Sami Li, Shanghuo Luo, Qiuyi Hwang, Jihye Gorai, Prasanta Hoque, Ariful Zhang, Yichen Lee, Jeong-Eun Zhang, Siju Mannfors, Emma Tharakkal, Devika Dewangan, Lokesh Bronfman, Leonardo Garcia, Pablo Tang, Xindi Das, Swagat R. Wu, Gang Lee, Chang-Won Chibueze, James O. Zhang, Yankun Gu, Qilao Tatematsu, Kenichi Wang, Guangli Zhu, Lei Shen, Zhiqiang |
| contents | High-mass stars, born in massive dense cores (MDCs), profoundly impact the cosmic ecosystem through feedback processes and metal enrichment, yet little is known about how MDCs assemble and transfer mass across scales to form high-mass young stellar objects (HMYSOs). Using multi-scale (40-2500 au) observations of an MDC hosting an HMYSO, we identify a coherent dynamical structure analogous to barred spiral galaxies: three 20,000 au spiral arms feed a 7,500 au central bar, which channels gas to a 2,000 au pseudodisk. Further accretion proceeds through the inner structures, including a Keplerian disk and an inner disk (100 au), which are thought to be driving a collimated bipolar outflow. This is the first time that these multi-scale structures (spiral arms, bar, streamers, envelope, disk, and outflow) have been simultaneously observed as a physically coherent structure within an MDC. Our discovery suggests that well-organized hierarchical structures play a crucial role during the gas accretion and angular momentum build-up of a massive disk. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_15527 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A misaligned protostellar disk fed by gas streamers in a barred spiral-like massive dense core Mai, Xiaofeng Liu, Tie Liu, Xunchuan Zhang, Bo Goldsmith, Paul F. Evans II, Neal J. Zhang, Qizhou Kim, Kee-Tae Yang, Dongting Juvela, Mika Xu, Fengwei Jiao, Wenyu Liu, Hongli Sanhueza, Patricio Garay, Guido Chen, Xi Qin, Shengli Vorster, Jakobus M. Tej, Anandmayee Ren, Zhiyuan Dib, Sami Li, Shanghuo Luo, Qiuyi Hwang, Jihye Gorai, Prasanta Hoque, Ariful Zhang, Yichen Lee, Jeong-Eun Zhang, Siju Mannfors, Emma Tharakkal, Devika Dewangan, Lokesh Bronfman, Leonardo Garcia, Pablo Tang, Xindi Das, Swagat R. Wu, Gang Lee, Chang-Won Chibueze, James O. Zhang, Yankun Gu, Qilao Tatematsu, Kenichi Wang, Guangli Zhu, Lei Shen, Zhiqiang Astrophysics of Galaxies Solar and Stellar Astrophysics High-mass stars, born in massive dense cores (MDCs), profoundly impact the cosmic ecosystem through feedback processes and metal enrichment, yet little is known about how MDCs assemble and transfer mass across scales to form high-mass young stellar objects (HMYSOs). Using multi-scale (40-2500 au) observations of an MDC hosting an HMYSO, we identify a coherent dynamical structure analogous to barred spiral galaxies: three 20,000 au spiral arms feed a 7,500 au central bar, which channels gas to a 2,000 au pseudodisk. Further accretion proceeds through the inner structures, including a Keplerian disk and an inner disk (100 au), which are thought to be driving a collimated bipolar outflow. This is the first time that these multi-scale structures (spiral arms, bar, streamers, envelope, disk, and outflow) have been simultaneously observed as a physically coherent structure within an MDC. Our discovery suggests that well-organized hierarchical structures play a crucial role during the gas accretion and angular momentum build-up of a massive disk. |
| title | A misaligned protostellar disk fed by gas streamers in a barred spiral-like massive dense core |
| topic | Astrophysics of Galaxies Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2509.15527 |