[충청투데이 조재근 기자] It turned out that the black hole first discovered by mankind in 1964 was farther away and heavier than the existing hypothesis.
According to the Korea Astronomical Research Institute on the 19th, an international joint research team succeeded in measuring the precise location of the X-1 Cygnus black hole using a U.S. ultra-long-air interferometer (VLBA) telescope connected to 10 radio telescopes.
The X-1 Cygnus black hole is a blue supergiant star that forms a binary star system. It was first discovered in 1964 by an X-ray detector mounted on an atmospheric observation rocket.
The blue supergiants, the companion star of this black hole, emit high energy that is 100 times the mass of the sun and up to 1 million times the brightness of the sun, and orbits each other every 5.6 days.
The blue supergiant material flows into a black hole with a strong gravitational field, which rapidly rotates around the black hole and emits powerful X-rays.
The international joint research team observed radio signals from the black hole X-1 Cygnus and confirmed its location through triangulation, which precisely measures the location of celestial bodies at a distance from Earth.
As a result, the distance from Earth to the black hole X-1 Cygnus was about 7200 light-years, farther than the previously known 6,100 light-years.
It was found that the black hole mass was 21 times the mass of the Sun, about 50% heavier than the previously known mass.
The X-1 Cygnus black hole is a’star mass black hole’ that is born at the end of the star’s evolution, and it is expected to be evidence that the formation and growth process of the black hole until the pottery is newly evolving as heavy stars evolve.
Co-author of this study, Professor Ilya Mandel, University of Monash, Australia, said, “Considering that the mass is much heavier than the previous hypothesis, this means that the mass loss in the evolution process was relatively low.” “It is likely that it was formed from the collapse of a star that was 60 times the mass of the Sun tens of thousands of years ago.”
Dr. Tae-Hyun Jeong of Korea Astronomical Research Institute said, “We plan to continue research on X-3 Cygnus, a subsequent black hole, using the Korea Space Radio Observation Network (KVN), which is the only one in the world that can simultaneously observe four frequency bands.”
The results of this study were published in the international journal’Science’ on the 18th.
Reporter Jae-geun Cho [email protected]
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