Although photometric space‐based missions such as CoRoT or Kepler have yielded rotation measurements of many thousands of late‐type stars during the last decade, the rotational properties of the bulk of the G star population remain undetected by these missions. From the Sun (when viewed as a star), we know that rotation measurements in the ultraviolet are the most promising, or more general, measurements in wavelength regions very sensitive to plage areas on the stars. Therefore, the “classical” S‐index, that is, the strength of the Ca II H&K line core emission, is still the most viable activity and rotation indicator, and with robotic spectroscopy telescopes, such monitoring measurements can be carried out efficiently and economically. We define a complete volume‐limited sample of solar stars in the immediate solar environment and present period measurements in Ca II H&K, both from archival Mount Wilson data and new data obtained with our robotic TIGRE facility.

中文翻译：

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邻近太阳附近的类太阳恒星的旋转

尽管CoRoT或Kepler等光度空基任务在过去十年中，已经获得了数千颗晚型恒星的自转测量值，这些任务尚未发现大部分G星群体的自转特性。从太阳（当被视为恒星）时，我们知道紫外线的旋转测量是最有前途或更普遍的波长测量，该波长区域对恒星的斑块区域非常敏感。因此，“经典的” S指数，即Ca II H＆K线芯发射的强度，仍然是最可行的活动和旋转指标，并且借助机器人光谱望远镜，可以高效，经济地进行此类监测。我们定义了一个完整的体积有限的太阳恒星样本，该样本是在当前太阳环境中进行的，并且当前在Ca II H＆K中进行了测量，