# PCS 181 Chapter Notes - Chapter 10: Schwarzschild Radius, Stellar Black Hole, Active Galactic Nucleus

## Document Summary

20 m explodes as a supernova event and leaves a blackhole singularity. Schwarzchild = non-rotating blackholes recall: a collapsed stellar core is 25m determine the radius of its eh (= radius of the blackhole) Several constants are in the previous equation: 2, g, m, and vesc = c after evaluating all these constants, it gives us ~3000m = 3km the previous equation then just simply becomes the schwarzchild radius. Rs = 3m* km (remember to use km) this simpli ed version is on the formula sheet where, m* = mobject/m . If the mass of the singularity is given in solar masses i. e. 9m , 20m , 27m , then the rs are, 27/3 = 9m note: rs is in km when you use this simpli ed equation. Blackholes generally divided into 4 categories depending on mass. They emit no light, so we can"t see a blackhole directly.