一个超大质量黑洞二进制的微弱,极其可变的X射线潮破坏事件?
Mengqiu Huang1,2, Yongquan Xue1,2, Shuo Li3
1Department of Astronomy, University of Science and Technology of China, Hefei 230026, Anhui, China.
Innovation (Cambridge (Mass.))
|March 6, 2026
概括
研究人员发现了XID 935,一个不寻常的X射线瞬态,为潮破坏事件 (TDE) 提供了新的见解. 这一事件挑战了当前的模型,强调了对超大质量黑洞相互作用的精细模拟的需要.
科学领域:
- 天文学和天体物理学
- 时间域天文学 时间域天文学
- 高能天体物理学 高能天体物理学
背景情况:
- 潮破坏事件 (TDE) 发生在恒星被超大质量黑洞 (SMBH) 摧毁时.
- 这些事件对于理解SMBH物理和星系进化至关重要.
- 时间域天文学使得我们能够研究诸如TDE之类的短暂现象.
研究的目的:
- 报告发现和描述一个不寻常的X射线瞬态,XID 935.
- 通过深度X射线观测来调查TDE候选者.
- 测试现有的理论模型与XID 935的观测光曲线对比.
主要方法:
- 利用了7 Ms Chandra深地南方调查的数据,这是迄今为止最深的X射线调查.
- 分析了XID 935的20年长的X射线光曲线,确保了约9.5 Ms的总曝光.
- 将观测数据与部分TDE和SMBH二进制TDE模型进行比较.
主要成果:
- 在1999年至2016年期间,XID 935的X射线总体变暗率超过了40倍.
- 在2015年两个月内观察到X射线亮度显著增加>27倍.
- XID 935的峰值X射线流是X射线选择的TDE候选人记录的最微弱的.
结论:
- 一个部分的TDE模型无法完全解释XID 935所观察到的下降趋势.
- 一个SMBH二进制TDE模型部分符合光曲线,但与短期波动作斗争.
- XID 935的独特特性是改善TDE模型和模拟的关键基准.
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