论文标题
59个类似太阳的恒星和新的Maunder最低候选HD 166620中的50年的色球活性
Five Decades of Chromospheric Activity in 59 Sun-like Stars and New Maunder Minimum Candidate HD 166620
论文作者
论文摘要
我们将59个类似太阳的恒星作为时间序列的5年色球环活性测量。其中包括并扩展了威尔逊山调查（1966--2001）的恒星色球活性观测和延长35年的35年，并继续观察到加利福尼亚星球搜索（1996--）。威尔逊山调查于1995年进行了密切研究，并揭示了与太阳11年周期相似的周期性活动周期。加利福尼亚星球搜索提供了超过五十年的测量，从而显着提高了我们对这些恒星活动行为的理解。我们已经策划了活动测量值，以创建连续的时间序列，并根据预定的系统对出色的样本进行了分类。我们使用Lomb-Scargle周期图分析了29颗恒星，并在其活动时间序列中呈现最佳合适的正弦曲线。我们报告了每个自行车星的最佳拟合期，以及恒星参数（t $ _ {eff} $，log（g），v $ sin（i）$等）。作为这些数据的第一个应用，我们提供了可能的最低候选者HD 166620。
We present five decades of chromospheric activity measurements in 59 Sun-like stars as time series. These include and extend the 35 yr of stellar chromospheric activity observations by the Mount Wilson Survey (1966--2001), and continued observations at Keck by the California Planet Search (1996--). The Mount Wilson Survey was studied closely in 1995, and revealed periodic activity cycles similar to the Sun's 11 yr cycle. The California Planet Search provides more than five decades of measurements, significantly improving our understanding of these stars' activity behavior. We have curated the activity measurements in order to create contiguous time series, and have classified the stellar sample according to a predetermined system. We have analyzed 29 stars with periodic cycles using the Lomb-Scargle periodogram, and present best-fit sinusoids to their activity time series. We report the best-fit periods for each cycling star, along with stellar parameters (T$_{eff}$, log(g), v$sin(i)$, etc.) for the entire sample. As a first application of these data, we offer a possible Maunder minimum candidate, HD 166620.
