期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 501, 期 1, 页码 1352-1369出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/staa3705
关键词
methods: numerical; stars: formation; stars: massive; stars: winds; outflows; HII regions
资金
- Ministry of Science, Research and the Arts Baden-Wurttemberg (MWK)
- German Research Foundation (DFG) [INST 35/1314-1 FUGG]
- NOVA grant
Winds from young massive stars contribute significantly to the energy of their host molecular clouds, but have minimal impact on the radial expansion of the nebula. The 3D geometry and evolution of wind bubbles are highly aspherical and chaotic, characterized by fast-moving 'chimneys' and thermally driven 'plumes'.
Winds from young massive stars contribute a large amount of energy to their host molecular clouds. This has consequences for the dynamics and observable structure of star-forming clouds. In this paper, we present radiative magnetohydrodynamic simulations of turbulent molecular clouds that form individual stars of 30, 60, and 120 solarmasses emitting winds and ultraviolet radiation following realistic stellar evolution tracks. We find that winds contribute to the total radial momentum carried by the expanding nebula around the star at 10 per cent of the level of photoionization feedback, and have only a small effect on the radial expansion of the nebula. Radiation pressure is largely negligible in the systems studied here. The 3D geometry and evolution of wind bubbles is highly aspherical and chaotic, characterized by fast-moving 'chimneys' and thermally driven 'plumes'. These plumes can sometimes become disconnected from the stellar source due to dense gas flows in the cloud. Our results compare favourably with the findings of relevant simulations, analytic models and observations in the literature while demonstrating the need for full 3D simulations including stellar winds. However, more targeted simulations are needed to better understand results from observational studies.Y
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