标题： 太阳失落的兄弟姐妹们 显示英文标题

标题： The lost siblings of the Sun

摘要： 太阳系中观测到的埃奇沃斯-库珀带的异常化学丰度和结构限制了太阳诞生时所在星团的初始质量和半径为$M\simeq500$到 3000\msun ，以及$R\simeq 1$到 3 秒差距。 当星团瓦解时，太阳的兄弟恒星分散在银河系中，但它们仍然围绕银河系中心运行在相似的轨道上。 如今，这些太阳的兄弟恒星隐藏在场星之中，但在距离$\sim 100$秒差距范围内仍然存在 10 到 60 颗。 通过精确测量这些太阳兄弟恒星的化学丰度、位置和速度，可以识别出它们。 即使找到少数几颗，也能强烈约束孕育它们的母星团的参数以及我们在银河系中的出生地点。 显示英文摘要

摘要： The anomalous chemical abundances and the structure of the Edgewood-Kuiper belt observed in the solar system constrain the initial mass and radius of the star cluster in which the sun was born to $M\simeq500$ to 3000 \msun and $R\simeq 1$ to 3 pc. When the cluster dissolved the siblings of the sun dispersed through the galaxy, but they remained on a similar orbit around the Galactic center. Today these stars hide among the field stars, but 10 to 60 of them are still present within a distance of $\sim 100$ pc. These siblings of the sun can be identified by accurate measurements of their chemical abundances, positions and their velocities. Finding even a few will strongly constrain the parameters of the parental star cluster and the location in the Galaxy where we were born.