Identifying the principal mechanism of star formation feedback

@misc{li2026identifying,
  title = {{Identifying the principal mechanism of star formation feedback}},
  author = {Chong Li and Rouyu Li and Keping Qiu and Marko Krco and Di Li and Hongchi Wang and Xin Lyu and Yan Duan and Min Fang and Xuepeng Chen and Lile Wang and Haoran Feng and Shuinai Zhang and Miaomiao Zhang and Shaobo Zhang and Yue Cao and Yao Wang and Yan Gong and Fujun Du and Zhiwei Chen and Yang Su and Yuehui Ma and Yuchen Xing and Yinghui Zheng and Tianwei Zhang and Shu Niu and Chenrui Li and Jiawei Liu and Zhijun Zhang and Yulian Guo},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.16557},
  eprint = {2610.16557},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.16557},
}

TY  - UNPB
TI  - Identifying the principal mechanism of star formation feedback
AU  - Chong Li
AU  - Rouyu Li
AU  - Keping Qiu
AU  - Marko Krco
AU  - Di Li
AU  - Hongchi Wang
AU  - Xin Lyu
AU  - Yan Duan
AU  - Min Fang
AU  - Xuepeng Chen
AU  - Lile Wang
AU  - Haoran Feng
AU  - Shuinai Zhang
AU  - Miaomiao Zhang
AU  - Shaobo Zhang
AU  - Yue Cao
AU  - Yao Wang
AU  - Yan Gong
AU  - Fujun Du
AU  - Zhiwei Chen
AU  - Yang Su
AU  - Yuehui Ma
AU  - Yuchen Xing
AU  - Yinghui Zheng
AU  - Tianwei Zhang
AU  - Shu Niu
AU  - Chenrui Li
AU  - Jiawei Liu
AU  - Zhijun Zhang
AU  - Yulian Guo
PY  - 2026
DA  - 2026/10/12
PB  - arXiv
DO  - 10.48550/arxiv.2610.16557
UR  - https://arxiv.org/abs/2610.16557
AB  - Feedback from massive stars regulates the formation of next-generation stars and planets and thus shapes the evolution of galaxies, yet observational evidence capable of determining which mechanism dominates the feedback process has long been lacking. Here,we present a large-scale HI survey toward Orion A$.$ With an unprecedented sensitivity and superior resolution, FAST (Five-hundred-meter Aperture Spherical radio Telescope) reveals a well-defined heart-shaped expanding HI bubble, enshrouding the well-known "Veil" bubble of ionized gas. The photoionization-driven and wind-driven gas expands at 10.9 and 13.8 kilometers per second, respectively, with a kinetic energy ratio of 1:2 assuming a spherical symmetry and a uniform HI-to-H2 ratio. This first direct comparison within a single bubble shows that radiation does not dominate the feedback process as predicted by classical theories; instead, stellar winds contribute a comparable share of the injected kinetic energy.
ER  -