一个超发光的类星体,有一个12亿太阳质量的黑洞,红移6.30
Xue-Bing Wu1, Feige Wang1, Xiaohui Fan2
11] Department of Astronomy, School of Physics, Peking University, Beijing 100871, China [2] Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China.
Nature
|February 27, 2015
概括
天文学家发现了一个超发光类星体 (SDSS J010013.02+280225.8),红移z=6.30. 这颗类星体拥有超大质量黑洞,挑战了早期宇宙形成理论.
科学领域:
- 天文学和天体物理学
- 宇宙学的宇宙学是什么?
- 黑洞物理学 黑洞物理学
背景情况:
- 红移大于z=6的类星很少见,黑洞质量约为10^9太阳质量.
- 早期的宇宙 (不到10亿年) 对黑洞形成和增长理论提出了挑战.
- 超大质量黑洞及其宿主星系的共同进化是宇宙学研究的一个关键领域.
研究的目的:
- 报告发现了一个新的,高发光的类星体在高红移.
- 为了研究黑洞及其周围环境的特性.
- 为了测试现有的黑洞形成和早期宇宙中的增长模型.
主要方法:
- 使用光学和近红外数据对类星体SDSS J010013.02+280225.8进行光谱分析.
- 黑洞质量的估计基于近红外光谱和埃丁顿限制增量率.
- 使用莱曼-α排放线底线测量电离近距离区域大小.
主要成果:
- 在红移z=6.30时发现类星体SDSS J010013.02+280225.8,呈现出异常亮度.
- 估计黑洞质量大约为1.2 x 10^10太阳质量,与埃丁顿有限积累相一致.
- 确定一个大型的电离近距离区域 (约. 2600万光年),比在类似红移的低亮度类星体中观察到的要大.
结论:
- 发现的类星体为了解早期宇宙中的黑洞生长提供了关键数据.
- 在如此早期的宇宙时代,巨大的黑洞挑战了现有的形成和进化模型.
- 对发光的高红移类星体的进一步研究对于完善宇宙学理论至关重要.
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