Astronomers in the United States and Europe have announced that they have detected a medium-mass black hole for the first time. This is the first medium-mass black hole detected by mankind so far.
This gravitational wave detection study involving more than 1,500 researchers showed that about 7 billion years ago, two black holes with a mass of 66 and 85 times that of the sun, after a violent collision, formed a new medium mass. Black hole.
What is an intermediate mass black hole?
Naijatechnews.com knows that an intermediate-mass black hole is a theoretically predicted type of black hole, between the star-level black hole and the supermassive black hole, and the mass is 100 to 1000 times that of the sun. The mass of the medium-mass black hole detected this time is 142 times that of the sun.
Black holes are generally divided into three types: Stellar mass black holes (“sMBHs”), intermediate mass black holes (“IMBHs”) and supermassive black holes (“SMBHs”) according to their mass. .
However, there are predictions that theoretically there are primordial black holes born in the early universe with extremely small scale and mass, as well as supermassive black holes (HMBHs) that have just been proposed in recent years. Their mass range covers 10 10 ~ 10 12 times the mass of the sun is even greater.
How did the middle-mass black hole originate?
According to Einstein’s relativity equation, black holes can have masses of any size, but in the universe, black holes of a certain mass can only be produced through astrophysics: the collapse of massive stars is a major way to form black holes, but it also affects black holes. Mass sets some limits: According to the stellar evolutionary chemistry, the outward pressure of photons and gas from the star’s core will be balanced with the inward gravitational force, so that the star is in a stable state. Once the two forces are out of balance, the star will be It will collapse under its own gravity and cause a supernova to explode. Depending on the mass of the star itself, it may become a white dwarf star, a neutron star or a black hole.
Is this the first discovery of a medium-mass black hole in human history?
In a sense, yes, but from the perspective of gravitational waves, this black hole was discovered as early as the GW190521 gravitational wave event on May 21, 2019, and then a group of scientists on September 2 this year Published research reports in “Physics Review Newsletter” and “Astrophysical Journal Newsletter” that the discovery of a gravitational wave signal can prove that the above-mentioned intermediate-mass black hole does exist. The intermediate-mass black hole they discovered is about 142 times the mass of the sun. , Is the first medium-mass black hole detected by mankind so far.
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