Chinese scientists have recently discovered a 'giant black hole' in the universe with a mass beyond imagination. Scientists say that in theory, this kind of giant black hole should not exist.
According to CNN, researchers previously believed that stellar black holes, that is, black holes formed by stars after death, collapse and explosion, will not exceed 20 times the mass of the sun. Because when these stars die, they will lose most of their mass because of the explosion, and the material and gas released by the explosion will be blown away by the stellar wind. However, this theory has now been overturned by a special case, that is, the latest black hole LB-1 discovered by Chinese scientists.
It is reported that the giant black hole LB-1 is about 15000 light-years away from the earth and its mass is 70 times that of the sun. " According to most current stellar evolution models, black holes with this mass should not even exist in our galaxy, "said Professor Liu Jifeng of the National Astronomical Observatory of China, who is responsible for the study." the mass of LB-1 is twice that we think it is possible. Now, relevant theorists have to accept the challenge to explain the formation of this giant black hole. "
In this regard, the Chinese team has put forward many theories. According to the study, the giant mass of LB-1 shows that it is not formed by the collapse of one star, but by the collapse of two small black holes surrounding each other. Another possibility is that it is formed by 'supernova retreat'. Supernova refers to the final stage of stellar explosion. The material ejected in the explosion process falls back on the supernova, which is called 'retreat', and a black hole will be formed at this time.
The conjecture of the formation of this regression is theoretically possible, but scientists have never proved or observed this formation process. The study said that if this is the formation process of LB-1, humans may master 'direct evidence of this process' for the first time.
Physicist David middot of the University of Florida; David Reitze said: 'the discovery of black hole LB-1 forces us to re-examine our model of how stellar mass black holes form.'
According to the people's daily, this work is based on the observation data of LAMOST (Xinglong, China), Canary telescope (Canary Islands, Spain), Keck telescope (Hawaii, USA) and Chandra X-ray Observatory (USA). This study includes 55 authors from 29 units in 7 countries: China, the United States, Spain, Australia, Italy, Poland and the Netherlands.