Sub-second periodic radio oscillations in a microquasar
Abstract
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 as a ``microquasar'', as indicated by its superluminal motion of radio emission. It exhibits persistent x-ray activity over the last 30 years, with quasi-periodic oscillations of Hz and 34 and 67 Hz in the x-ray band. These oscillations likely originate in the inner accretion disk, but other origins have been considered. Radio observations found variable light curves with quasi-periodic flares or oscillations with periods of minutes. Here we report two instances of 5 Hz transient periodic oscillation features from the source detected in the 1.05-1.45 GHz radio band that occurred in January 2021 and June 2022, respectively. Circular polarization was also observed during the oscillation phase.
Keywords
Cite
@article{arxiv.2307.14015,
title = {Sub-second periodic radio oscillations in a microquasar},
author = {Pengfu Tian and Ping Zhang and Wei Wang and Pei Wang and Xiaohui Sun and Jifeng Liu and Bing Zhang and Zigao Dai and Feng Yuan and Shuangnan Zhang and Qingzhong Liu and Peng Jiang and Xuefeng Wu and Zheng Zheng and Jiashi Chen and Di Li and Zonghong Zhu and Zhichen Pan and Hengqian Gan and Xiao Chen and Na Sai},
journal= {arXiv preprint arXiv:2307.14015},
year = {2023}
}
Comments
The author version of the article which will appear in Nature on 26 July 2023, 32 pages including the extended data. The online publication version can be found at the following URL: https://www.nature.com/articles/s41586-023-06336-6