2026-10-14T05:04:38Z https://www.scidb.cn/oai

10.57760/sciencedb.21998 2025-04-25T09:44:53Z

2025-04-25 Quasi-periodic oscillations of GHz-band polarization in a black hole doi:10.57760/sciencedb.21998 en Relativistic jets from accreting black holes radiate non-thermal emission which is highly variable in different time scales. Previous studies on black holes of different mass scales, including supermassive and stellar-mass black holes, only report flux quasi-periodic oscillations in radio, optical, X-ray and gamma-ray bands. No quasi-periodic variations in polarization have yet been detected in any black hole systems. Here, we report the first detection of GHz-band radio polarization oscillations in GRS 1915+105 which harbors a fast-spinning stellar-mass black hole with a relativistic jet. Our observations show that during the increasing phase of radio emission, linear polarization and flux exhibit similar oscillation periods of $17$ and $33$ seconds, and their variation patterns anti-correlate with each other. These rare, short-period oscillations in both polarization and flux would be important to understand instabilities and special dynamics in magnetized relativistic jets. black hole; QPO; polarization; FAST Wang Wei Chen Jiashi Tian Pengfu Luis C. Ho Sun Xiaohui Wang Pei Zhang Bing Zheng Zheng Chen Xiao Zhang Ping Zhu Haifan Yang Wen Li Botao PUBLIC https://creativecommons.org/licenses/by-nc/4.0/ dataset http://www.doi.org/10.1038/s41467-025-59586-5 Science Data Bank