The age distribution of stars in the immediate solar environment

利用我们位于墨西哥瓜纳华托的TIGRE望远镜，我们已经开始了一项系统的工作，以确定在太阳环境中类似太阳的恒星的旋转速度和年龄的分布。确定野星的年龄是出了名的困难，监测CaII H&K线的核心辐射是确定类太阳恒星在相当低活动水平下旋转速度的少数方法之一。从2013年开始，我们已经开始使用TIGRE监测近100颗附近明亮的类太阳恒星；在给定的观测季节，我们通常获得每个对象40个光谱，即每个观测季节约有4000个光谱可用于分析。在这项资助申请的背景下，我们建议对现有数据以及未来几个季度将要收集的数据进行彻底分析。特别是，系统的影响和误差将以严格的方式进行调查。利用推导出的自转周期，我们可以对样本恒星进行陀螺年代学。利用现有数据或从TIGRE光谱导出的数据，将对样品恒星的有效温度和化学丰度进行计算；此外，我们将推导出所有样本恒星的s指数和锂当量宽度，从而可以通过陀螺仪年代学、等时线在演化轨迹上的位置以及活动指标和锂强度对样本恒星的年龄进行全面评估。

Using our TIGRE telescope located in Guanajuato, Mexico, we have begun a systematic effort to determine the distribution of rotation velocities and ages of solar-like stars in the immediate solar environment. Age determinations for field stars are notoriously difficult and monitoring the core emission in the CaII H&K lines is one of the few methods available to determine the rotation rates of solar-like stars at rather low levels of activity. Starting in 2013, we have begun -- using TIGRE -- monitoring almost 100 nearby bright solar-like stars; within a given observing season we obtain typically 40 spectra per object, i.e., per observing season about 4000 spectra are available for analysis.In the context of this funding application we propose to carry out a thorough analysis of the existing data as well as the data to be taken in the next few seasons. In particular, systematic effects and errors will be investigated in a rigorous fashion. With the derived rotation periods we can perform gyro-chronology on our sample stars. Either with existing data or with data derivable from the TIGRE spectra the effective temperatures and chemical abundances fo the sample stars will be carried out; furthermore we will derive S-indices as well as lithium equivalent widths for all sample stars, and can thus perform a comprehensive assessment of the ages of the sample stars through gyro-chronology, isochrone placement on evolutionary tracks as well activity indicators and lithium strength.