China Focus: Chinese astronomers discover unexpected huge stellar black hole

Eloise Marshall
December 4, 2019

Astronomers with the Chinese Academy of Sciences have announced the discovery of a black hole within our galaxy that they claim has a mass 70 times greater than our Sun.

Calculations recommend that the Milky Way galaxy's stellar-mass black holes - which kind after the violent deaths of big stars - ought to prime out at exclusively 25 instances the mass of the solar, the researchers stated. Astronomers have spotted one of these black holes in our galactic backyard, but it's a bit heftier than it ought to be. Previous detection methods required looking for holes eating gas from a star, making sightings relatively rare. In October, researchers discovered what they believe to be a new type of black hole, smaller than the other kinds. They found LB-1 was orbiting such a black hole, but it wasn't at all what they expected to see.

Stellar black holes are believed to be commonly scattered across the universe, but they are hard to detect because they do not normally emit X-rays - only doing so when they gobble up gas from a star that has ventured close enough. The telescope operates by searching for stars being pulled by invisible gravitational forces (from black holes).

"We thought that very massive stars with the chemical composition typical of our galaxy must shed most of their gas in powerful stellar winds, as they approach the end of their life", Liu explained. And earlier this week, astronomers discovered a black hole that is actually helping baby stars grow instead of destroying them. In some of the distant galaxies, the black holes with 70-80 solar masses have noticed from 2015.

LB-1 was observed as Liu's team analyzed a massive blue star, approximately 15,000 light-years away, oscillating around in the background of space.

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The leader of the team behind the discovery of LB-1, Liu Jifeng, said: "The black holes of such a mass should not even exist in our galaxy, according to the most current models of stellar evolution ".

"The revelation of LB-1 fits pleasantly with another leap forward in astronomy", institute agents included a similar articulation. For instance, the mass of the black hole is determined by its calculated distance.

"Now theorists will have to take up the challenge of explaining its formation", he said in a statement. The other theory that has been considered is that the black hole was created from a "fallback supernova".

Estimations propose that the Milky Way universe's outstanding mass dark openings - which structure after the brutal passings of goliath stars - should top out at just multiple times the mass of the sun, the scientists said.

"This remarkable result along with the LIGO-Virgo detections of binary black hole collisions during the past four years really points towards a renaissance in our understanding of black hole astrophysics", said Reitze.

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