Recently, Chinese scientists used radial velocity and astrometry methods to discover a promising mass-gap black hole in the binary system G3425. It has a mass of around 3.6 times the Sun, which could range from 3.1 to 4.4 times the Sun. Since no light comes from anything else in the system, this dark companion must be a black hole, with its mass in the “mass gap” range.
Hidden Small Black Hole Found in Unusual Binary System
In the binary system G3425.
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