Subsecond periodic radio oscillations in a microquasar

Pengfu Tian, Ping Zhang, Wei Wang (), Pei Wang, Xiaohui Sun, Jifeng Liu, Bing Zhang (), Zigao Dai, Feng Yuan, Shuangnan Zhang, Qingzhong Liu, Peng Jiang, Xuefeng Wu, Zheng Zheng, Jiashi Chen, Di Li, Zonghong Zhu, Zhichen Pan, Hengqian Gan, Xiao Chen and Na Sai
Additional contact information
Pengfu Tian: Wuhan University
Ping Zhang: Wuhan University
Wei Wang: Wuhan University
Pei Wang: Chinese Academy of Sciences
Xiaohui Sun: Yunan University
Jifeng Liu: Wuhan University
Bing Zhang: University of Nevada
Zigao Dai: Wuhan University
Feng Yuan: Chinese Academy of Sciences
Shuangnan Zhang: Chinese Academy of Sciences
Qingzhong Liu: Chinese Academy of Sciences
Peng Jiang: Chinese Academy of Sciences
Xuefeng Wu: Chinese Academy of Sciences
Zheng Zheng: Chinese Academy of Sciences
Jiashi Chen: Wuhan University
Di Li: Chinese Academy of Sciences
Zonghong Zhu: Wuhan University
Zhichen Pan: Chinese Academy of Sciences
Hengqian Gan: Chinese Academy of Sciences
Xiao Chen: Wuhan University
Na Sai: Wuhan University

Nature, 2023, vol. 621, issue 7978, 271-275

Abstract: Abstract Powerful relativistic jets are one of the ubiquitous features of accreting black holes in all scales1–3. GRS 1915 + 105 is a well-known fast-spinning black-hole X-ray binary4 with a relativistic jet, termed a ‘microquasar’, as indicated by its superluminal motion of radio emission5,6. It has exhibited persistent X-ray activity over the last 30 years, with quasiperiodic oscillations of approximately 1–10 Hz (refs. 7–9) and 34 and 67 Hz in the X-ray band10. These oscillations probably originate in the inner accretion disk, but other origins have been considered11. Radio observations found variable light curves with quasiperiodic flares or oscillations with periods of approximately 20–50 min (refs. 12–14). 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.

Date: 2023
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DOI: 10.1038/s41586-023-06336-6

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