Chinese Scientists Discover a Black Hole That Shouldn't Exist

[ExomatrixTV]

Chinese Scientists Discover a Black Hole That Shouldn't Exist

Source: https://youtube.com/watch?v=MR3TdSeaCUQ

A wide star–Black-Hole binary system from radial-velocity measurements

All stellar-mass black holes have hitherto been identified by X-rays emitted from gas that is accreting onto the black hole from a companion star. These systems are all binaries with a black-hole mass that is less than 30 times that of the Sun1,2,3,4. Theory predicts, however, that X-ray-emitting systems form a minority of the total population of star–black-hole binaries5,6. When the black hole is not accreting gas, it can be found through radial-velocity measurements of the motion of the companion star.

Here we report radial-velocity measurements taken over two years of the Galactic B-type star, LB-1. We find that the motion of the B star and an accompanying Hα emission line require the presence of a dark companion with a mass of 68+11−13 solar masses, which can only be a black hole. The long orbital period of 78.9 days shows that this is a wide binary system.

Gravitational-wave experiments have detected black holes of similar mass, but the formation of such massive ones in a high-metallicity environment would be extremely challenging within current stellar evolution theories.

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Source: https://youtube.com/watch?v=l57JTye0JLg