Gaia DR3 Reveals the Kinematics of Young Stellar Objects in the Carina Nebula: Peripheral Expansion and Central Rotation
Abstract
We investigate the kinematics of the Carina Nebula using a sample of young stellar objects (YSOs) cross-matched with Gaia DR3, together with 12CO (1−−0) molecular gas observations and APOGEE radial-velocity data. The results show that the proper motions of the YSOs in the four peripheral subregions of Carina display a systematic outward expansion, and that the two-dimensional expansion velocities of the subregions are approximately 0.57−−4.56 km s−1. The YSOs in the Central Region exhibit ordered rotation around an axis at a position angle of 86.9±1.5∘, with a rotation velocity of 1.75±0.03 km s−1. Further momentum estimates suggest that the current expansion in the peripheral regions may result from the combined effects of feedback from massive OB stars and possible past supernova explosions. These results indicate that feedback from massive stars plays a dominant role in the dynamical evolution of the giant molecular cloud in the Carina Nebula.
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BibTeX
@misc{yang2026gaia,
title = {{Gaia DR3 Reveals the Kinematics of Young Stellar Objects in the Carina Nebula: Peripheral Expansion and Central Rotation}},
author = {Xinyu Yang and Yuxin He and Chaojie Hao and Yiwei Dong and Y. Xu and Yingjie Li and ZeHao Lin and DeJian Liu and Jarken Esimbek and Jianjun Zhou and Gang Wu and Xindi Tang and Dalei Li},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.06488},
eprint = {2611.06488},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.06488},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Gaia DR3 Reveals the Kinematics of Young Stellar Objects in the Carina Nebula: Peripheral Expansion and Central Rotation
AU - Xinyu Yang
AU - Yuxin He
AU - Chaojie Hao
AU - Yiwei Dong
AU - Y. Xu
AU - Yingjie Li
AU - ZeHao Lin
AU - DeJian Liu
AU - Jarken Esimbek
AU - Jianjun Zhou
AU - Gang Wu
AU - Xindi Tang
AU - Dalei Li
PY - 2026
DA - 2026/11/04
PB - arXiv
DO - 10.48550/arxiv.2611.06488
UR - https://arxiv.org/abs/2611.06488
AB - We investigate the kinematics of the Carina Nebula using a sample of young stellar objects (YSOs) cross-matched with Gaia DR3, together with ^12CO (1−−0) molecular gas observations and APOGEE radial-velocity data. The results show that the proper motions of the YSOs in the four peripheral subregions of Carina display a systematic outward expansion, and that the two-dimensional expansion velocities of the subregions are approximately 0.57−−4.56 km s^−1. The YSOs in the Central Region exhibit ordered rotation around an axis at a position angle of 86.9±1.5^∘, with a rotation velocity of 1.75±0.03 km s^−1. Further momentum estimates suggest that the current expansion in the peripheral regions may result from the combined effects of feedback from massive OB stars and possible past supernova explosions. These results indicate that feedback from massive stars plays a dominant role in the dynamical evolution of the giant molecular cloud in the Carina Nebula.
ER -