Interstellar Gas Dynamics

星际气体动力学

• 批准号: DP0344961
• 负责人: Prof Mark Wardle
• 金额: $ 17.78万
• 依托单位: Macquarie University
• 依托单位国家: 澳大利亚
• 项目类别: Discovery Projects
• 财政年份: 2003
• 资助国家: 澳大利亚
• 起止时间: 2003-01-01 至 2007-11-30
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/DP0344961
• 关键词: Interstellar; Gas; Dynamics

The conversion of interstellar gas into stars is a key process in the life-history of galaxies and the formation of planetary systems. Star formation takes place within a heterogeneous, dynamic cloud, and entails a million-fold contraction controlled by a complex interplay between gravity, magnetic forces, ionisation balance, chemical reactions and particles of interstellar dust. Previous modelling has adopted inappropriate approximations for the evolution of the magnetic field. This research will bring a rigorous treatment of magnetic diffusion to bear on the theory of cloud evolution, shock waves, star formation and protoplanetary discs.

星际气体转化为恒星是星系生命史和行星系统形成的关键过程。恒星的形成发生在一个不均匀的动态云中，在引力、磁力、电离平衡、化学反应和星际尘埃粒子之间复杂的相互作用下，需要进行百万倍的收缩。以前的模型对磁场的演化采用了不适当的近似。这项研究将为云演化、激波、恒星形成和原行星盘理论带来严格的磁扩散处理。