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Eight new echoing black hole binaries have been discovered in our galaxy: MIT researchers

Black holes are intriguing and mysterious objects. They are also afraid because their gravitational force is so strong that they do not allow anything to pass through them, let alone light, except in the rare cases of feeding. When a black hole pulls gas and dust from a star in orbit, it sends out explosive bursts of X-ray, bouncing and resonating spiraling gas inside. At this stage, the rear hole illuminates its extreme surroundings. Researchers from MIT have now discovered eight new echoing black hole binaries in our galaxy galaxy – systems that revolve around a star and are occasionally eaten by a black hole. Previously only two knew.

The researchers searched for flashes and echoes from nearby black hole X-ray binaries using a new automated search tool called the “Reverberation Machine”. This research was supported to some extent by NASA.

By comparing the echoes, they formed a general picture of how a black hole evolves during an eruption. They found that a black hole would first undergo a “rough” state, whipping the corona of high-energy photons with a jet of relative particles launched close to the speed of light. The final, high-power flash is emitted through a black hole at a certain point. The system then enters a low-power (soft) state.

This last flash indicates that the corona of the black hole expanded briefly before completely disappearing. These researches, Published In the Astrophysical Journal, the largest black holes in the center of the galaxy help explain how its structure is formed.

“The Role of Black Holes in Galactic Evolution is an Excellent Question in Modern Astrophysics,” Said Erin Cara, an assistant professor of physics at MIT, said in a statement. By understanding the eruption in these tiny black hole binaries, Cara said, we can understand how similar explosions in supermassive black holes affect their native galaxies.

For their study, the team selected 26 black hole X-ray binary systems that emit X-ray stimuli. Of these, the team found that 10 systems were close and bright, which could detect X-ray echoes between eruptions. Eight out of 10 people do not already know that they produce echoes.

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