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相对论喷射活动来自巨大的黑洞对恒星的潮破坏
D N Burrows1, J A Kennea, G Ghisellini
1Department of Astronomy and Astrophysics, The Pennsylvania State University, 525 Davey Laboratory, University Park, Pennsylvania 16802, USA. burrows@astro.psu.edu
Nature
|August 26, 2011
概括
天文学家观察到超大质量黑洞附近罕见的恒星破坏事件,捕获了强大的X射线耀斑并触发了相对论喷气活动. 这一宇宙事件为黑洞养和喷气形成提供了新的见解.
科学领域:
- 天体物理学 天体物理学
- 黑洞物理学 黑洞物理学
- 高能天文学 高能天文学
背景情况:
- 超大质量黑洞 (SMBHs) 拥有强烈的引力场,能够潮地破坏恒星.
- 恒星潮干扰事件 (TDE) 从恒星碎片形成的积聚盘中产生明亮的火焰.
- 以前没有直接观察到TDE和相关的相对射流活动的出现.
研究的目的:
- 报告从银河系外的短暂恒星Swift J164449.3+573451.1中观测到一个明亮的X射线耀斑.
- 捕捉和分析恒星破坏事件的初始阶段及其后果.
- 调查来自SMBH的相对论喷气活动的潜在发作.
主要方法:
- 多波长观测,专注于X射线光谱区域.
- 随着时间的推移,监测瞬态源Swift J164449.3+573451的亮度增加.
- 与恒星潮干扰事件的理论模型进行比较.
主要成果:
- 观察到来自Swift J164449.3+573451的显著X射线耀斑,其亮度自1990年以来增加了1万倍以上.
- 捕获了相对论喷气活动的开始,与TDE的理论预测一致.
- 观察到的行为在细节上与目前的TDE理论模型有所不同.
结论:
- 该事件代表了首次观察到由恒星潮干扰事件引发的SMBH相对论喷气活动的出现.
- 这一观测为完善黑洞积聚和喷气发射的理论模型提供了关键数据.
- 详细的行为为了解TDE的复杂物理提供了新的途径.
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