Subsecond periodic radio oscillations in a microquasar
Subsecond periodic radio oscillations in a microquasar
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DOI：
10.1038/s41586-023-06336-6
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发表时间：
2023-07
期刊：
影响因子：
64.8
通讯作者：
P. Tian;Ping Zhang;Wen Wang;Pei Wang;Xiaohui Sun;Jifeng Liu;Bing Zhang;Zi-Gao Dai;F. Yuan;Shuangnan Zhang;Qing-zhong Liu;P. Jiang;Xuefeng Wu;Zheng Zheng-Zheng;Jiashi Chen;Di Li;Zonghong Zhu;Z. Pan;H. Gan;Xiao Chen;N. Sai
中科院分区：
文献类型：
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作者：
P. Tian;Ping Zhang;Wen Wang;Pei Wang;Xiaohui Sun;Jifeng Liu;Bing Zhang;Zi-Gao Dai;F. Yuan;Shuangnan Zhang;Qing-zhong Liu;P. Jiang;Xuefeng Wu;Zheng Zheng-Zheng;Jiashi Chen;Di Li;Zonghong Zhu;Z. Pan;H. Gan;Xiao Chen;N. Sai
强大的相对论喷流是所有尺度的吸积黑洞的普遍特征之一。GRS 1915 + 105是一个著名的快速旋转的黑洞X射线双星，具有相对论性喷流，被称为“微类星体”，如其射电辐射的超光速运动所示。在过去的30年里，它表现出持续的X射线活动，具有大约1-10 Hz的准周期振荡（参考文献，- ）和34和67 Hz的X射线波段。这些振荡可能起源于内吸积盘，但其他来源已被考虑。射电观测发现了具有准周期性耀斑或振荡的可变光变曲线，周期约为20-50分钟（参考文献，-).在这里，我们报告了两个发生在2021年1月和2022年6月在1.05至1.45 GHz无线电频段检测到的源的约5 Hz瞬态周期振荡特征。在振荡阶段也观察到圆极化。
Powerful relativistic jets are one of the ubiquitous features of accreting black holes in all scales, –. GRS 1915 + 105 is a well-known fast-spinning black-hole X-ray binary with a relativistic jet, termed a ‘microquasar’, as indicated by its superluminal motion of radio emission,. It has exhibited persistent X-ray activity over the last 30 years, with quasiperiodic oscillations of approximately 1–10 Hz (refs., –) and 34 and 67 Hz in the X-ray band. These oscillations probably originate in the inner accretion disk, but other origins have been considered. Radio observations found variable light curves with quasiperiodic flares or oscillations with periods of approximately 20–50 min (refs., –). Here we report two instances of approximately 5-Hz transient periodic oscillation features from the source detected in the 1.05- to 1.45-GHz radio band that occurred in January 2021 and June 2022. Circular polarization was also observed during the oscillation phase.