Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 514, Issue 1, Pages 43-54Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stac808
Keywords
methods: numerical; stars: kinematics and dynamics; Hii regions; open clusters and associations: individual: Orion Nebula Cluster
Categories
Funding
- JSPS KAKENHI [19H01933, 20K14532, 21J00153, 21K03614, 21K03633, 21H04499]
- Initiative on Promotion of Supercomputing for Young or Women Researchers, Information Technology Center, the University of Tokyo
- MEXT
- University of Tokyo Excellent Young Researcher Program
- one-hundred-talent project of Sun Yatsen University
- National Natural Science Foundation of China [12073090]
- JSPS International Research Fellow (Graduate School of Science, the University of Tokyo)
- Grants-in-Aid for Scientific Research [21K03614, 21J00153, 21K03633, 20K14532, 21H04499] Funding Source: KAKEN
Ask authors/readers for more resources
The motion of massive stars in star clusters plays a crucial role in the formation of star clusters and H ii regions. These stars terminate star cluster formation by ionizing the surrounding gas, and the ejected stars can also contribute to the formation of holes and bubbles.
Massive stars born in star clusters terminate star cluster formation by ionizing the surrounding gas. This process is considered to be prevalent in young star clusters containing massive stars. The Orion Nebula is an excellent example associated with a forming star cluster including several massive stars (the Orion Nebula Cluster, ONC) and a 2-pc-sized H ii region (ionized bubble) opening towards the observer; however, the other side is still covered with dense molecular gas. Recent astrometric data acquired by the Gaia satellite revealed the stellar kinematics in this region. By comparing these data with star cluster formation simulation results, we demonstrate that massive stars born in the ONC centre were ejected via three-body encounters. Further, orbit analysis indicates that theta(2) Ori A, the second massive star in this region, was ejected from the ONC centre towards the observer and is now returning to the cluster centre. Such ejected massive stars can form a hole in the dense molecular cloud and contribute to the formation of the 2-pc bubble. Our results demonstrate that the dynamics of massive stars are essential for the formation of star clusters and H ii regions that are not always centred by massive stars.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available