标题： 非恒星形成透射分子云MBM16的动力学研究：星际介质中剪切驱动湍流的证据 显示英文标题

标题： A Dynamical Study of the Non-Star Forming Translucent Molecular Cloud MBM16: Evidence for Shear Driven Turbulence in the Interstellar Medium

摘要： 我们利用一幅完全采样的$^{12}$CO图以及新的$^{13}$CO数据，对高纬度云MBM16进行了速度相关性研究，得出了结果。 我们发现相关长度为0.4 pc。 这与我们在先前研究中描述的甲醛团块大小相似。 我们将这种相关运动与湍流中的相干结构联系起来。 这些结构是由自由剪切流产生的。 它们在这颗不形成恒星的云中的存在表明，动能正由外部剪切流注入内部湍流。 这种大规模驱动长时间作用可能是分子云湍流耗散问题的一个可能解决方案。 显示英文摘要

摘要： We present the results of a velocity correlation study of the high latitude cloud MBM16 using a fully sampled $^{12}$CO map, supplemented by new $^{13}$CO data. We find a correlation length of 0.4 pc. This is similar in size to the formaldehyde clumps described in our previous study. We associate this correlated motion with coherent structures within the turbulent flow. Such structures are generated by free shear flows. Their presence in this non-star forming cloud indicates that kinetic energy is being supplied to the internal turbulence by an external shear flow. Such large scale driving over long times is a possible solution to the dissipation problem for molecular cloud turbulence.