Real-time changes from Europa's surface

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

Nature Astronomy Pub Date : 2025-05-21 DOI:10.1038/s41550-025-02568-w

Luca Maltagliati

引用次数: 0

Abstract

Europa's icy surface presents a variety of morphological features, indicative of an active environment exchanging materials with the ice shell and its underlying ocean. Such materials subsequently get modified by the strong radiation which Europa is bathed in. Richard Cartwright and colleagues show that some areas exhibit changes that happened in a space of mere days.

The authors use data from the NIRSpec spectrometer on JWST, whose wavelength range (1.48–5.35 µm) allows the identification of various icy features. The results for crystalline water ice display an apparent contradiction: its 1.65 µm spectral feature is especially strong at northern latitudes, but its narrow 3.1 µm peak is present only at the Tara and Powys Regiones in the southern hemisphere.

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木卫二表面的实时变化

木卫二冰冷的表面呈现出各种形态特征，表明活跃的环境与冰壳及其下面的海洋交换物质。这些物质随后被木卫二所沐浴的强辐射所改变。Richard Cartwright和他的同事们发现，一些区域在短短几天内就发生了变化。作者使用的数据来自JWST上的NIRSpec光谱仪，其波长范围（1.48-5.35µm）可以识别各种冰的特征。结晶水冰的结果显示了一个明显的矛盾：它的1.65µm光谱特征在北纬地区特别强烈，但它的3.1µm窄峰只出现在南半球的塔拉和波伊斯地区。

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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