Cygni V404, 7,800 light-years away … Black Hole
Imagination V404 Cygni Black Hall V404 Cygni, which sucks material from a companion star and makes a sticky disc. A jet that spins when the blue part of the center dances. [ICRAR 제공]
A black hole in the middle of a galaxy strongly ejects matter at a rate close to the light in the center. It is known that this phenomenon, known as & # 39; jet, occurs only as a straight line, but it was reported to academics for the first time that a jet "strange," spinning like a dancer, was first observed.
According to the International Center for Radio Astronomy Research (ICRAR), a team of researchers led by James Miller-Jones of Curtin University in Australia says that the black hole jet "Cygni V404", which is about of 7,800 light-years from Earth. The results of the observation of the changes are published in the current issue of the journal Nature.
The Cygni V404 is nine times the mass of the sun and absorbs the material as it is accompanied by a red giant that is slightly smaller than the sun near it.
It was discovered in 1989 that a huge jet phenomenon was observed. There were records of explosions in 1938 and 1956, but they did not know it was a black hole. The blast lasted about two weeks in 2015 and detailed observations were made.
Miller-Jones's team also observed it using a Very Long Baseline Array (VLBA), an ultra-thin baseline consisting of continental-sized telescopes with 10 radio telescopes in the United States.
V404 Cygni, like any other black hole, has created a so-called "adventure disc" that revolves around a black hole dragging material from nearby stars.
Dancing V404 Cygni Blackhole Jet The inner part of the disc (threaded shape) is moving like a top, and the jet is changing its direction as if it were dancing. [ICRAR 제공]
This anchor disk has a width of 10 million km, and the thousands of miles more internal were observed to swing like a top with reduced torque with swollen thread form, which is different from that of a typical black hole.
The researchers assumed that the axis of rotation of the black hole and the alignment of the anchoring discrepancy caused the inner part of the disk to make the same movement as the top so that the jet was drawn and the material was not ejected in a straight line . It was analyzed that it changed according to the time.
"It's one of the strangest black hole systems we've seen so far," said Dr. Miller-Jones. "It's the only mechanism that can explain the fast-moving car wash seen on the Cygni V404."
The Cygni V404 jets were less than 2 hours away.
The researchers used the radio telescope observation technique to observe about 4 hours and extract an image. After obtaining a blurred image, they extracted 103 images in 70 seconds and connected them to confirm the movement of the jet. .
Around a rotating black hole that is known to be distorted in time and space. [ICRAR 제공]
Gemma Anderson, of Curtin University, co-author of the article, said: "This phenomenon can be seen where the black holes are misaligned and the surrounding matter is flowing into the adherent disk," he said. As well as explosive events such as tearing and tearing stars. "
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