以二氧化钛吸收为代理探测比邻星的长期变化与活动周期
Titanium Oxide Absorption as a Proxy to Detect Long term Variation and Activity Cycle in Proxima Centauri
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中文总结 AI 辅助
本研究以TiO吸收为代理，利用HARPS光谱数据探测比邻星长期活动变化，测得其活动周期约2873天，与前期测量结果一致。
中文摘要 AI 辅助
对磁活动活跃恒星的活动周期可通过分子吸收带估算。此前已提出一种分子指数，用于对比TiO567nm的吸收线强度与其邻近连续谱。本研究利用HARPS的光谱数据，采用该指标评估比邻星的长期活动变化，结果显示其活动周期为2873(+47.4-53.9)天，与其他指标的前期测量结果相似。
英文摘要
Stellar activity cycles on magnetically active stars can be estimated by molecular absorption bands. We have previously introduced a molecular index which compares absorptional line strength of the TiO567nm with its nearby continuum has previously been introduced. In this work we use this indicator to evaluation long-term activity variations for Proxima Centauri star, using spectroscopic data from HARPS. The results indicate periodicity with an activity period of 2873(+47.4-53.9) days, which is similar to the previous measurements from other indicators.
