以氧化钛吸收为替代物探测比邻星的长期变化和活动周期

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Astrophysics and Space Science Pub Date : 2024-08-02 DOI:10.1007/s10509-024-04345-z

Fatemeh Azizi, Mohammad Taghi Mirtorabi, Rahimeh Foroughi

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引用次数: 0

摘要

磁活跃恒星的恒星活动周期可以通过分子吸收带来估算。我们之前已经介绍了一种分子指数，它可以比较（TiO/lambda 567nm）的吸收线强度与其附近的连续波。在这项工作中，我们使用这一指标，利用来自 HARPS 的光谱数据，评估了半人马座比邻星的长期活动变化。结果表明活动周期为\(2873_{-53.9}^{+47.4}\)天，这与之前其他指标的测量结果相似。

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Titanium oxide absorption as a proxy to detect long term variation and activity cycle in Proxima Centauri

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Titanium oxide absorption as a proxy to detect long term variation and activity cycle in Proxima Centauri

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 \(TiO\lambda 567nm\) 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 \(2873_{-53.9}^{+47.4}\) days, which is similar to the previous measurements from other indicators.

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来源期刊

Astrophysics and Space Science 地学天文-天文与天体物理

CiteScore

3.40

自引率

5.30%

发文量

106

审稿时长

2-4 weeks

期刊介绍： Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered. The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing. Astrophysics and Space Science features short publication times after acceptance and colour printing free of charge.