We analyze 4050 wide binary star systems involving a white dwarf (WD) and usually a main-sequence (MS) star, drawn from the large sample assembled by Tian et al. Using the modeling code BASE-9, we determine the system’s ages, the WD progenitors’ zero-age MS masses, the extinction values (A _V ), and the distance moduli. Discarding the cases with poor age convergences, we obtain ages for 3551 WDs, with a median age precision of σ _τ /τ = 20%, and system ages typically in the range of 1–6 Gyr. We validated these ages against the very few known clusters and through cross validation of 236 WD-WD binaries. Under the assumption that the components are coeval in a binary system, this provides precise age constraints on the usually low-mass MS companions, mostly inaccessible by any other means.

我们分析了 4050 个宽双星系统，其中包括一颗白矮星 (WD)，通常是一颗主序 (MS) 恒星，这些恒星是从 Tian 等人收集的大样本中提取的。使用建模代码BASE-9中，我们确定了系统的老化，WD祖细胞零年龄MS群众，消光值（甲 _V），和距离模数。丢弃年龄收敛性较差的情况，我们获得了 3551 个 WDs 的年龄，年龄中位数精度为σ _τ / τ = 20%，系统老化通常在 1–6 Gyr 范围内。我们针对极少数已知集群并通过 236 个 WD-WD 二进制文件的交叉验证验证了这些年龄。假设组件在双星系统中是同时代的，这为通常质量低的 MS 伴星提供了精确的年龄限制，大多数情况下无法通过任何其他方式访问。