论文标题
非宇宙拉尔森关系的物理学
Physics of Non-Universal Larson's Relation
论文作者
论文摘要
从新的角度来看，我们共同重新检查了自我实力和动荡，希望理解在星际介质（ISM）中最重要的经验关系之一的物理基础（ISM），Larson的关系，与速度分散（$σ_R$）相关的关系到云大小（$ r $）。我们报告了两个主要的新发现。首先，拉尔森关系的正确形式是$σ_r=α_v^{1/5}σ_{pc}（r/1pc）^{3/5} $，其中$α_v$是云的病毒参数，$σ_{pc} $是湍流的强度，是湍流的强度。其次，拉尔森关系的幅度$σ_{pc} $并非通用，在银河系磁盘上的云和银河系中心的云之间的差异约为两个因素，这证明了观察数据的证明。
From a new perspective, we re-examine self-gravity and turbulence jointly, in hopes of understanding the physical basis for one of the most important empirical relations governing clouds in the interstellar medium (ISM), the Larson's Relation relating velocity dispersion ($σ_R$) to cloud size ($R$). We report on two key new findings. First, the correct form of the Larson's Relation is $σ_R=α_v^{1/5}σ_{pc}(R/1pc)^{3/5}$, where $α_v$ is the virial parameter of clouds and $σ_{pc}$ is the strength of the turbulence, if the turbulence has the Kolmogorov spectrum. Second, the amplitude of the Larson's Relation, $σ_{pc}$, is not universal, differing by a factor of about two between clouds on the Galactic disk and those at the Galactic center, evidenced by observational data.
