一个X射线发射的原星团在z ≈ 5.7显示了结构的快速增长
Ákos Bogdán1, Gerrit Schellenberger2, Qiong Li3
1Center for Astrophysics | Harvard & Smithsonian, Cambridge, MA, USA. abogdan@cfa.harvard.edu.
Nature
|January 28, 2026
概括
我们报告了Chandra和JWST首次联合检测到一个巨大的原星团,JADES-ID1,红移z≈5.68. 这个早期的星系团显示了冲击加热气体的证据,表明早期宇宙中的快速大规模结构形成.
科学领域:
- 宇宙进化的宇宙进化.
- 银河系星系团的形成
- 早期宇宙天体物理学 天体物理学
背景情况:
- 星系团是宇宙中最庞大的结构.
- 原始集群是了解早期集群形成的关键.
- 检测原始星团是具有挑战性的,因为松散结合的星系和新生的集群内部介质 (ICM).
研究的目的:
- 报告Chandra和JWST联合检测到一个原始星团在z ≈ 5.68.
- 为了研究早期ICM加热和大规模光环形成.
- 测试大规模结构组装的宇宙学模型.
主要方法:
- 利用了来自查德拉X射线天文台和詹姆斯·韦伯太空望远镜 (JWST) 的综合数据.
- 通过高红移星系的过密度识别了原始星团候选星系 (z 5).
- 检测到的X射线辐射揭示了热的集群内部介质 (ICM).
主要成果:
- 在z ≈ 5.68.8上报告了JADES-ID1原团的检测.
- 测量了一个波罗米特X射线亮度为 (1.5+0.5-0.6) × 10^44 erg s^-1.
- 推断出总引力质量为 (1.8+0.6-0.7) × 10^13 M,表明一个巨大的星团祖先.
- 检测到扩展,冲击加热的气体,显示大量ICM加热在z ≈ 5.7.7的大型光环中.
结论:
- JADES-ID1是大质量星系团的重要祖先.
- 实质性的ICM加热发生在巨型光环中,早在z ≈ 5.7.7时就发生了.
- 这种巨大的星团的快速形成表明,一些早期宇宙区域的大型结构组装速度比标准模型预测的要快.
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