红色，在宇宙早期绝对没有死亡

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

Nature Astronomy Pub Date : 2024-07-22 DOI:10.1038/s41550-024-02332-6

Morgan Hollis

引用次数: 0

摘要

最近，在JWST的帮助下，天文学分类学中又多了一个新成员，那就是红移为3 < z < 9的神秘紧凑型尘埃衰减星系群，它们被称为 "小红点"（LRDs）。托尼玛-阿南娜及其同事分析了X射线观测数据，研究它们的发射是否主要来自活动星系核中吸积超大质量黑洞（SMBHs）的通量，或者是另一种更好的解释，比如与旺盛恒星形成相关的年轻恒星。研究小组利用钱德拉X射线天文台（Chandra X-rayObservatory）的超深度观测，观察了之前在JWST红外观测中发现的LRD，它们都位于透镜星系团Abell 2744的后方。在X射线数据中没有探测到单个的LRD，这使得作者能够将这些星系中超大质量黑洞的质量上限设定为≲ (1.5-16) × 106 M⊙（假设为爱丁顿限制吸积）。

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Red and definitely not dead in the early Universe

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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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