What is the Role of Gravity,Turbulence and Magnetic Fields in High-mass Star Formation Clouds?

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外文摘要：To explore the potential role of gravity,turbulence and magnetic fields in high-mass star formation in molecular clouds,this study revisits the velocity dispersion-size(σ-L)and density-size(ρ-L)scalings and the associated turbulent energy spectrum using an extensive data sample.The sample includes various hierarchical density structures in high-mass star formation clouds,across scales of 0.01-100pc.We observe σ∝ L0.26 and ρ∝L-154 scalings,converging toward a virial equilibrium state.A nearly flat virial parameter-mass(αvir-M)distribution is seen across all density scales,with αvir values centered around unity,suggesting a global equilibrium maintained by the interplay between gravity and turbulence across multiple scales.Our turbulent energy spectrum(E(k))analysis,based on the σ-L and ρ-L scalings,yields a characteristic E(k)∝k-1.52.These findings indicate the potential significance of gravity,turbulence,and possibly magnetic fields in regulating dynamics of molecular clouds and high-mass star formation therein.

外文关键词：

ISM:cloudsstars:formationstars:kinematics and dynamics

作者：

An-Xu Luo、Hong-Li Liu、Guang-Xing Li、Sirong Pan、Dong-Ting Yang

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作者单位：

School of Physics and Astronomy,Yunnan University,Kunming 650091,China

South-Westem Institute for Astronomy Research,Yunnan University,Kunming 650500,China

基金：

National Key R&D Program of ChinaNational Natural Science Foundation of China(NSFC)Yunnan Fundamental Research ProjectYunnan Fundamental Research ProjectXingdian Talent Support Plan—Youth ProjectNational Natural Science Foundation of China(NSFC)

项目编号：

2022YFA160310112103045202301AT070118202401AS07012112033005

出版年：

2024

DOI：

10.1088/1674-4527/ad3ec8

天文和天体物理学研究

中国科学院国家天文台

天文和天体物理学研究

CSTPCD

影响因子：0.406

ISSN：1674-4527

年,卷(期)：2024.24(6)