标题： 年轻双星盘演化：从观测到理论 显示英文标题

标题： Disk Evolution in Young Binaries: from Observations to Theory

摘要： 围绕星盘形成的双星系统是最常见的恒星形成结果。因此，研究和理解双星系统的形成与演化以及相关的盘结构是恒星形成科学的基础。此外，由于双星系统内的组分是同时形成的，并且它们的盘大小由伴星的潮汐截断决定，双星系统提供了一个理想的“实验室”，可以用来在明确的边界条件下研究盘的演化。 本文综述了多星系统中几个内盘诊断的观测结果，包括氢发射线（表明正在进行的吸积）、$K-L$和$K-N$色余量（表明温暖的内盘）和偏振（表明每个组分周围盘的相对取向）。我们考察了这些性质在双星系统内的相关程度，以及这种相关程度如何依赖于分离度和质量比等参数。 这些发现将从两种模型的角度进行解释：一种是将每个盘视为孤立储层的模型，另一种是盘受到来自某种形式的环绕双星储层再供应的模型，我们还将批判性地回顾这种观测证据。多星系统的行星形成潜力将根据单星、双星主星和双星次级星周围的盘寿命来讨论。 最后，我们总结了几个可能揭示性的观测问题和未来项目，这些问题和项目可以在未来十年内进一步深入了解盘演化。 显示英文摘要

摘要： The formation of a binary system surrounded by disks is the most common outcome of stellar formation. Hence studying and understanding the formation and the evolution of binary systems and associated disks is a cornerstone of star formation science. Moreover, since the components within binary systems are coeval and the sizes of their disks are fixed by the tidal truncation of their companion, binary systems provide an ideal "laboratory" in which to study disk evolution under well defined boundary conditions. In this paper, we review observations of several inner disk diagnostics in multiple systems, including hydrogen emission lines (indicative of ongoing accretion), $K-L$ and $K-N$ color excesses (evidence of warm inner disks), and polarization (indicative of the relative orientations of the disks around each component). We examine to what degree these properties are correlated within binary systems and how this degree of correlation depends on parameters such as separation and binary mass ratio. These findings will be interpreted both in terms of models that treat each disk as an isolated reservoir and those in which the disks are subject to re-supply from some form of circumbinary reservoir, the observational evidence for which we will also critically review. The planet forming potential of multiple star systems is discussed in terms of the relative lifetimes of disks around single stars, binary primaries and binary secondaries. Finally, we summarize several potentially revealing observational problems and future projects that could provide further insight into disk evolution in the coming decade