What is the minimal size of black holes? The mass of a black | ASTRO-MECHANICS
What is the minimal size of black holes?
The mass of a black hole formed by the collapse of a larger star is limited by the Oppenheimer-Volkoff limit. Its exact value is not known, as it depends on many poorly understood parameters. In general, this limit lies between 2.14 and 2.17 solar masses.
All stars lighter than 2.14 solar masses are definitely not black holes. The highly probable BH candidates known today have significantly higher masses, from 6 solar masses and higher.
For primary (small) black holes the lower value is the Planck mass: 2.176⋅10^(-8) kg. But primary black holes are hypothetical objects and have not been discovered yet
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