Rare relativistic black hole explosions captured by Giant Telescope: Okezone techno

TELESCOPE China’s five-hundred-meter Aperture Spherical Radio Telescope (FAST) captured the black hole’s relativistic outbursts. The black hole, named GRS 1915+105, was observed by the International Research Team.

As published in the journal Nature, the black hole has exhibited persistent X-ray activity for the past 30 years, with almost periodic oscillations in the X-ray waves.

In recent years, from 2020 to 2022, research teams from the Astronomy Department of Wuhan University, the National Astronomical Observatories of the Chinese Academy of Sciences and several other institutions continued to observe the eruption.

According to the study, strong relativistic jets are one of the characteristics of accreting black holes, and GRS 1915+105 is a famous fast-spinning X-ray binary black hole with relativistic flashes, known as “microquasars”, as demonstrated by superluminal motion radio emission.

FAST is the largest single dish radio telescope in the world. This telescope is commonly used to observe the continuous changes in the light of the radio spectrum and the polarization of GRS 1915+105.

With the high sampling rate and sensitivity of FAST, the research team was able to detect two transient periodic oscillation events of about 0.2 seconds in January 2021 and June 2022, respectively.

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Transient periodic oscillations remain unstable and undetectable most of the time. Hence, it is called a quasi-periodic oscillation.

This is the first time in the world that a sub-second low-frequency quasi-periodic radio oscillation has been observed in a microquasar, which also directly links the phenomenon to relativistic bursts.

This is of great scientific importance for discovering the origin and dynamical processes of relativistic radio bursts from very dense space objects and will open new avenues for radio observation and theoretical research of black holes.

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