论文标题
Sedigism调查:分子云形态。 ii。集成的源属性
The SEDIGISM survey: Molecular cloud morphology. II. Integrated source properties
论文作者
论文摘要
内部银河室内介质(Sedigism)调查的结构,激发和动力学产生了银河系的高(空间和光谱)分辨率$^{13} $ CO(2-1)地图。它使我们能够以前所未有的细节水平研究内星系中的分子星际介质,并将其表征为分子云。在上一篇论文中,我们将塞精神云归类为四个形态。但是,这四种形态的云的特性如何变化。在这里,我们使用Sedigism Cloud的形态分类来找到云形态,其综合性能以及它们在缩放关系图上的位置之间的联系。我们观察到,与其他形态相比,类似环形的云显示出最特殊的特性,其质量,大小,宽高比和速度分散剂的质量,大小,宽高比和速度分散体具有更高的特性。我们推测这与调节其形成和进化的物理机制有关,例如,恒星反馈的湍流通常会导致产生类似气泡的结构。我们还看到了具有病毒参数的形态趋势,从而使环状,细长,块状和浓缩云具有降低的病毒参数。我们的发现为基于可测量的特性更好地理解分子云行为提供了基础。
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.