SEDIGISM巡天：分子云形态。II。综合源特性
The SEDIGISM survey: Molecular cloud morphology. II. Integrated source properties
摘要：
银河系内部星际介质的结构、激发和动力学（SEDIGISM）巡天已经产生了高（空间和光谱）分辨率的银河系$^{13}$ CO（2-1）图。它使我们能够以前所未有的详细程度研究银河系内部的分子星际介质，并将其转化为分子云。在以前的论文中，我们已经将SEDIGISM云分为四种形态。然而，这四种形态的云的性质如何变化还不清楚。在这里，我们使用SEDIGISM云的形态分类，找到云形态之间的连接，它们的综合属性，以及它们在比例关系图上的位置。我们观察到，环状云显示出最奇特的特性，平均而言，具有更高的质量，尺寸，长宽比和速度色散相比，其他形态。我们推测这与调节它们形成和演化的物理机制有关，例如，来自恒星反馈的湍流通常会导致气泡状结构的产生。我们还看到了一个趋势的形态与维里参数，其中环状，细长，cloudly和集中的云有维里参数在一个递减的顺序。我们的研究结果提供了一个基础，更好地了解分子云行为的基础上，其可测量的属性。
英文摘要：
The Structure, Excitation, and Dynamics of the Inner Galactic InterStellar Medium (SEDIGISM) survey has produced high (spatial and spectral) resolution $^{13}$CO (2-1) maps of the Milky Way. It has allowed us to investigate the molecular interstellar medium in the inner Galaxy at an unprecedented level of detail and characterise it into molecular clouds. In a previous paper, we have classified the SEDIGISM clouds into four morphologies. However, how the properties of the clouds vary for these four morphologies is not well understood. Here, we use the morphological classification of SEDIGISM clouds to find connections between the cloud morphologies, their integrated properties, and their location on scaling relation diagrams. We observe that ring-like clouds show the most peculiar properties, having, on average, higher masses, sizes, aspect ratios and velocity dispersions compared to other morphologies. We speculate that this is related to the physical mechanisms that regulate their formation and evolution, for example, turbulence from stellar feedback can often results in the creation of bubble-like structures. We also see a trend of morphology with virial parameter whereby ring-like, elongated, clumpy and concentrated clouds have virial parameters in a decreasing order. Our findings provide a foundation for a better understanding of the molecular cloud behaviour based on their measurable properties.
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