标题： 分子云复合体的详细研究：M31中GMC的干涉观测 显示英文标题

标题： Molecular cloud complexes in detail: Interferometric observations of GMCs in M31

摘要： 我们利用Plateau de Bure干涉仪获得了M31中几个巨分子云（GMCs）的12CO(1-0)和(2-1)数据。样本覆盖了5到18千秒差距的星系中心距以及各种物理条件。空间分辨率达到了3秒差距。所有研究的巨分子云都被分解为多个成分，不仅仅是那些巡天位置已显示出明显多峰谱的情况。然而，在M31干涉仪波束的小体积内，这种动力学上分离的发射在空间上是重合的，这强烈表明速度分裂的原因可能是局部效应。这与巡天数据中观测到的强流体力学运动缺失是一致的。有时在速度空间中的强烈分离性质需要进一步研究。完整数据集（即包括大规模巡天）提供了对分子气体的独特全面视图，这使得可以详细研究恒星形成的条件，并有助于建立推导分子气体性质的指导原则。 显示英文摘要

摘要： We have accumulated 12CO(1-0) and (2-1) data of several GMCs in M31 using the Plateau de Bure Interferometer. The sample covers a range of 5 to 18 kpc galactocentric distance and various physical conditions. The spatial resolution attains values down to 3 pc. All GMCs investigated have been resolved into several components, also seemingly quiescent clouds and not only the cases where already the survey positions show obvious multiple-peaked spectra. Such kinematically disjunct emission is however spatially coincident in the small volume of the interferometer beam in M31, which strongly favours local effects as the cause of the velocity splitting. This is well consistent with the observed absence of strong streaming motions in the survey data. The nature of the sometimes strong separation in velocity space needs further investigation. The complete data set (i.e. including the large-scale survey) yields a uniquely complete view of the molecular gas which allows to investigate the conditions for star formation in detail and helps to establish guide lines for the derivation of the properties of molecular gas.