银河中心分子区（CMZ）的不对称性：气体供给还是反馈作用？
The CMZ Asymmetries: Feeding or Feedback?
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中文总结 AI 辅助
本研究针对银河中心分子区（CMZ）的两种不对称性，探讨其成因，涉及气体供给、云团分布或反馈事件三种可能机制。
中文摘要 AI 辅助
银河中心分子区（CMZ）四分之三的致密气体与尘埃位于正经度和正径向速度处，而多数24微米波长的致密源位于负经度处。这两种不对称性表明，要么是沿棒状尘埃带发生了近期的不对称气体注入，要么是大部分分子气体包含在少量大质量、引力束缚的云团中，要么是发生了一次重大反馈事件，使CMZ的一整个致密气体区域发生了离解。
英文摘要
Three-fourths of the dense gas and dust in the CMZ is located at positive longitudes and positive radial velocities. The majority of compact 24 micrometer wavelength sources are at negative longitudes. These two asymmetries indicate either a recent asymmetric injection of gas along the bar dust lanes, or that most of the molecular gas is contained in a small number of massive, gravitationally bound clouds, or a major feedback episode which dissociated an entire sector of the CMZ's dense gas.
