The complex variability of 55 Cnc e

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

Nature Astronomy Pub Date : 2024-08-15 DOI:10.1038/s41550-024-02354-0

Luca Maltagliati

引用次数: 0

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55 Cnc e 的复杂多变性

巨蟹座 55（55 Cnc e）是一颗极端的行星。它是一颗岩石天体，半径约为 1.8 个地球半径，周期仅为 0.74 天，白天温度高达 3,000 K，夜晚温度则低 1,500 K 以上。55 Cnc e的掩星深度也有很大的变化，但难以解释，这可能是揭示其表面和假定大气层难以捉摸性质的线索。作者分析了 NIRCam 在 2.1 μm 和 4.5 μm 波段获得的 55 Cnc e 的 5 次掩星。两个信道都显示出很大的掩星变异，亮度温度也暗示着大气层的存在。然而，它们是由 3:2 异步轨道共振引起的假说被排除了，因为波动与掩星数奇偶性无关。更令人费解的是，两个通道的变化也互不相关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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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