论文标题
候选超级质量黑洞二进制于恒星潮汐中断X射线耀斑
X-ray flares from the stellar tidal disruption by a candidate supermassive black hole binary
论文作者
论文摘要
光学瞬态调查导致发现了星系中心的大量黑洞发现了数十个恒星潮汐破坏事件（TDES）。尽管进行了广泛的搜索，但X射线随访观察结果在其中大多数X射线检测中均未产生或仅产生弱的X射线检测。在这里，我们报告了在TDE Ogle16AAA的光爆发后140天内发现延迟X射线亮度的发现，随后在衰减阶段进行了几次磁通倾角。对于标准TDE，这些特性是不寻常的，可以通过超级质量黑洞二元或斑点遮挡来解释。在这两种情况下，X射线都可以在破坏后立即产生，但在早期阶段被阻塞，可能是通过辐射主导的喷射来导致大部分光学和紫外线发射。我们的发现表明，重新处理在TDE早期进化中很重要，并且X射线观察在揭示超大质量的黑洞二进制方面有希望。
Optical transient surveys have led to the discovery of dozens of stellar tidal disruption events (TDEs) by massive black hole in the centers of galaxies. Despite extensive searches, X-ray follow-up observations have produced no or only weak X-ray detections in most of them. Here we report the discovery of delayed X-ray brightening around 140 days after the optical outburst in the TDE OGLE16aaa, followed by several flux dips during the decay phase. These properties are unusual for standard TDEs and could be explained by the presence of supermassive black hole binary or patchy obscuration. In either scenario, the X-rays can be produced promptly after the disruption but are blocked in the early phase, possibly by a radiation-dominated ejecta which leads to the bulk of optical and ultraviolet emission. Our findings imply that the reprocessing is important in the TDE early evolution, and X-ray observations are promising in revealing supermassive black hole binaries.
