A mini-TRAPPIST-1 system around Barnard’s Star

IF 14.3 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Nature Astronomy Pub Date : 2025-04-14 DOI:10.1038/s41550-025-02543-5

Luca Maltagliati

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巴纳德星周围的迷你trappist -1系统

巴纳德星是距离地球最近、研究最多的M矮星之一，人们已经进行了各种尝试，以确定它是否拥有行星。尽管做出了这些努力，但直到2024年，VLT上ESPRESSO光谱仪的径向速度数据才首次探测到系外行星（j.i. González Hernández等）。阿斯特朗。天文学。690,A79；2024)。同样的研究还发现了另外三个未经证实的信号。有了这些知识，Ritvik Basant和他的同事重新审视了这个系统。作者分析了另一个摄谱仪——Gemini North的MAROON-X获得的数据，首先单独分析，然后与ESPRESSO数据联合分析，从而可以探测到小于50 cm s-1的径向速度信号。他们确认了四颗行星在一个非常紧凑的结构中存在：最里面的行星周期为2.34天，最外面的行星周期为6.74天。值得注意的是，它们的最小质量都非常小，在0.19到0.34 M⊕之间。

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Nature Astronomy Physics and Astronomy-Astronomy and Astrophysics

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19.50

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2.80%

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252

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