Sub-second radio periodic oscillations in microquasar
收藏科学数据银行2024-07-30 更新2026-04-23 收录
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资源简介：
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 $\sim 1-10$ 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 $\sim 20-50$ minutes. Here we report two instances of $\sim$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.
提供机构：
Zhonghong Zhu; Zhichen Pan; Zigao Dai; Xiaohui Sun; WHU-NAOC Joint Center for Astronomy; Department of Physics and Astronomy, University of Nevada; Nevada Center for Astrophysics, University of Nevad; WHU-NAOC Joint Center for Astronomy, Wuhan University; Hengqian Gan; Pengfu Tian; WHU-NAOC Joint Center for Astronomy, Wuhan University,; Jifeng Liu; National Astronomical Observatories, Chinese Academy of Sciences; Guizhou Radio Astronomy Observatory, Guizhou University; Shanghai Astronomical Observatory, Chinese Academy of Sciences; Department of Astronomy, School of Physics and Technology, Wuhan University; Shuangnan Zhang; Qingzhong Liu; Xuefeng Wu; Institute for Frontiers in Astronomy and Astrophysics, Beijing Normal University; Jiashi Chen
创建时间：
2023-05-25
