Caption: Cartoon of a Schwarzschild black hole (FK-545; ABS-195,222).
The formula and 3 fiducial-value formulae for the Schwarzschild radius are
Caption: Cartoon of a Schwarzschild black hole (FK-545; ABS-195,222).
The formula and 3 fiducial-value formulae for the Schwarzschild radius are
R_sch = 2GM/c**2
= 2.9532 km (M/M_☉)
≅ 3 km (M/M_☉)
= 0.019741 AU [M/(M_☉**6)]
≅ 0.02 AU [M/(M_☉*10**6)]
= 19.741 AU [M/(M_☉**9)]
≅ 20 AU [M/(M_☉*10**9)]
= 9.5741*10**(-5) pc [M/(M_☉*10**9)]
≅ 10**(-4) pc [M/(M_☉*10**9)] .
Even largest supermassive black hole
known only have masses up to only of order
10**10 M_☉,
and so can only have Schwarzschild radii
of order hundreds of astronomical units.
Credit/Permission: © David Jeffery,
2005 / Own work.
Image link: Itself.
Local file: local link: blackhole_schwarzschild.html.
File: Black hole file:
blackhole_schwarzschild.html.