死星照耀下的海洋

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

Nature Astronomy Pub Date : 2025-01-23 DOI:10.1038/s41550-025-02476-z

Luca Maltagliati

引用次数: 0

摘要

一颗低质量恒星在离开主序星之后，在成为白矮星之前，会经历剧烈的剧变。这种变化彻底重组了其行星系的结构：在红巨星阶段，内部可能被恒星本身吞没，而在渐近巨星阶段，恒星质量的损失会引起动力不稳定，引发外部天体的迁移。尽管白矮星的高辐射环境通常不利于居住，但这样的天体最终可能会进入恒星的宜居带。茱莉亚·贝克尔（Juliette Becker）和同事们模拟了这些行星环境的演变，以确定它们是否能容纳表面液态水。贝克尔和他的同事们关注的是半径与地球相似、质量在雪线之外、在3到10天文单位之间形成的行星，因此它们可能富含水。他们模拟了水库的蒸发和逃逸，因为这颗行星一开始是100%氢的低质量大气，受到恒星后主序演化的影响。由动力剧变引起的潮汐加热的影响，导致行星轨道的迁移、偏心和随后的圆化，可能是相当可观的，并包括在模型中。

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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Oceans under the light of moribund stars

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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.