标题： 基于盖亚DR2的白矮星-星团关联 显示英文标题

标题： White dwarf-open cluster associations based on Gaia DR2

摘要： 形成白矮星（WDs）的基本参数和物理过程可以通过在疏散星团（OCs）中发现WDs来约束和改进。 星团成员身份可以用来确定这些WDs的精确距离、光度、年龄和前体质量。 我们整理了一份可能的WDs列表，这些WDs是疏散星团的成员，以促进对银河系场WDs来说难以或不可能进行的WD研究。 我们使用基于\textit{盖亚}卫星任务第二数据发布（GDR2）的最新WDs和OCs目录，来识别属于OCs的WDs。 这种交叉匹配得益于GDR2中的天体测量和光度数据以及由此生成的目录。 假设大多数WD成员属于DA型，我们估计了WD的质量、冷却年龄和前体质量。 我们已经发现了几个新的可能的WD成员，并重新评估了之前与所研究的OCs相关联的文献WDs的成员资格。 其中一些恢复的WDs落在最近报告的初始-最终质量关系（IFMR）在$M_{i} \sim 2.0 M_{\odot}$附近的不连续区域，这使得在这个范围内对IFMR的约束更加严格。 显示英文摘要

摘要： Fundamental parameters and physical processes leading to the formation of white dwarfs (WDs) may be constrained and refined by discovering WDs in open clusters (OCs). Cluster membership can be utilized to establish the precise distances, luminosities, ages, and progenitor masses of such WDs. We compile a list of probable WDs that are OC members in order to facilitate WD studies that are impractical or difficult to conduct for Galactic field WDs. We use recent catalogs of WDs and OCs that are based on the second data release of the \textit{Gaia} satellite mission (GDR2) to identify WDs that are OC members. This crossmatch is facilitated by the astrometric and photometric data contained in GDR2 and the derived catalogs. Assuming that most of the WD members are of the DA type, we estimate the WD masses, cooling ages, and progenitor masses. We have detected several new likely WD members and reassessed the membership of the literature WDs that had been previously associated with the studied OCs. Several of the recovered WDs fall into the recently reported discontinuity in the initial-final mass relation (IFMR) around $M_{i} \sim 2.0 M_{\odot}$, which allows for tighter constrains on the IFMR in this regime.