Why wide Jupiter-mass binary objects cannot form

IF 14.3 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Nature Astronomy Pub Date : 2025-07-18 DOI:10.1038/s41550-025-02609-4

Simon Portegies Zwart, Erwan Hochart

引用次数: 0

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为什么宽木星质量的双星不能形成

源于Y Wang等人。Nature Astronomy https://doi.org/10.1038/s41550-024-02239-2（2024）在四边形星团的中心部分发现了Npp = 40个木星质量的双星天体（JuMBOs，这里Npp代表行星-行星双星的数量）和Np = 500个自由漂浮的木星质量天体（JMOs， Np给出单个自由漂浮行星的数量），这引发了对它们起源的质疑。Wang等人认为，围绕同一颗恒星运行的两颗行星被近距离接触剥离的速度可以解释在四边形星团中观察到的大约一半的jumbo。尽管他们的横截面计算与我们自己的计算一致，但我们不能将他们的结果外推到集群环境中，因为这忽略了由于在集群环境中随后遇到jumbo而导致的分离。所提出的情景不能解释宽轨道自由浮动的行星对，因为形成率被高估，破坏率被低估。在缺乏另一种有效机制的情况下，我们质疑jumbo的存在，并考虑对观察结果的独立确认。

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来源期刊

Nature Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

19.50

自引率

2.80%

发文量

252

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