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Revisiting Ca II Activity Indices in FGK Stars: Systematic Biases in Infrared Triplet Measurements

  • Authors: Xiaozhen Yang, 肖振 杨, Xiaoting Fu, 晓婷 符, Mingjie Jian, 明杰 简, Jingkun Zhao, 景昆 赵, Hailong Yuan, 海龙 袁, Zhongrui Bai, 仲瑞 白, Mengxin Wang, 梦欣 汪, Yiqiao Dong, 义乔 董, Mingkuan Yang, 明宽 杨, Ziyue Jiang, 子悦 蒋, Qian Liu, 倩 刘, Ganyu Li, 甘雨 李, Haotong Zhang, 昊彤 张

Xiaozhen Yang et al 2026 The Astrophysical Journal Supplement Series 287 .

  • Provider: AAS Journals

Caption: Figure 8.

Distributions of the estimated uncertainties, ﹩\delta {R}_{{\rm{HK}}}^{+}﹩ and ﹩\delta {R}_{8542}^{+}﹩, derived from simulations based on the A1 templates. The Gaussian fits and their corresponding means and standard deviations are also shown.

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