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IF 12.9 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Nature Astronomy Pub Date : 2024-07-17 DOI:10.1038/s41550-024-02329-1

Luca Maltagliati

引用次数: 0

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凭借其精湛的精度和宽广的波长范围，JWST 能够将系外行星的特征描述稳固地推进到海王星以下的范围。这类行星的大小大约在 1.5 到 2.5 个地球半径（R⊕）之间，是宇宙中最常见的行星，但它们的性质和内部结构却存在着激烈的争论。Björn Benneke及其同事利用JWST对2.2 R⊕大小的TOI-270 d的观测，深入了解了这一难以捉摸的类别。最显著的特征是一连串的五个强甲烷波段，作者可以从中确定大气的平均分子量为 \({5.47}_{-1.14}^{+12.5}\) amu--远远高于以 H/He 为主的大气。加上二氧化碳的探测以及 H2O 和 CS2 的初步探测，作者可以确定大气中至少有一半的质量是挥发性金属。

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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

期刊介绍： Nature Astronomy, the oldest science, has played a significant role in the history of Nature. Throughout the years, pioneering discoveries such as the first quasar, exoplanet, and understanding of spiral nebulae have been reported in the journal. With the introduction of Nature Astronomy, the field now receives expanded coverage, welcoming research in astronomy, astrophysics, and planetary science. The primary objective is to encourage closer collaboration among researchers in these related areas. Similar to other journals under the Nature brand, Nature Astronomy boasts a devoted team of professional editors, ensuring fairness and rigorous peer-review processes. The journal maintains high standards in copy-editing and production, ensuring timely publication and editorial independence. In addition to original research, Nature Astronomy publishes a wide range of content, including Comments, Reviews, News and Views, Features, and Correspondence. This diverse collection covers various disciplines within astronomy and includes contributions from a diverse range of voices.