我们的银河系雏形初现

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

Nature Astronomy Pub Date : 2024-11-11 DOI:10.1038/s41550-024-02423-4

Lindsay Oldham

引用次数: 0

摘要

最近有人提出，一个z = 8.3的强透镜星系系统--即今年早些时候用JWST观测到的萤火虫闪烁星系--很可能是一个类似于银河系的星系的祖先，这突出表明我们需要对银河系进行详细的、自洽的建模，以便将银河系目前的特性与其生命早期阶段的预期特性联系起来。Elka Rusta 及其同事利用银河系演化的半分析模型，对这一祖先假说进行了鉴别测试，并对银河系的物理特性提出了新的约束条件。通过利用银河系演化模型 NEFERTITI 建立合成光谱，作者表明，z ≲ 8 时银河系原生系统中质量最大的星系在典型的无透镜 JWST 勘测（如 JADES）中被探测到的概率为 50%，而到 z ≲ 7 时，其探测到的概率增加到了 1。在环境方面，考虑到透镜放大率意味着在萤火虫闪耀中观测到的星团数量与作者的模型一致--这表明现有的 JWST 数据很可能包括我们尚未意识到的其他银河原生系统。作者还表明，他们的模型预测光度与观测结果一致，这意味着恒星的形成历史是随机和突发的。

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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Our Galaxy seen in its infancy

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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.