把化学时钟倒转到宇宙正午

IF 14.3 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Nature Astronomy Pub Date : 2025-08-18 DOI:10.1038/s41550-025-02643-2

Bokyoung Kim

引用次数: 0

摘要

长期以来，银河系和星系外的考古学家一直试图将银河系和早期宇宙之间的点联系起来，他们经常借用彼此的术语。斯蒂芬妮·蒙蒂和他的同事们建议使用铁和氧丰度作为化学空间参数来重建“宇宙正午”（z≈2-3）时银河系的全面图像。作者从GALAH DR3收集了银河系和本星系群中已分辨恒星群的丰度数据，包括高α和低α盘星、原位和吸积晕星、球状星团、M31中的行星状星云和卫星星系。另外，在宇宙午时形成恒星的星系的铁和氧的丰度是从四个星系调查中获得的，其中氧的丰度根据尘埃消耗进行了调整。所有来自本星系群和宇宙正午星系的数据都以太阳为参照进行了缩放，以便在宇宙时间内提供一致的化学富集视图。

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Rewinding the chemical clock to cosmic noon

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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.