What is the energy density of a 10 solar mass black hole as if the mass is distributed throughout the volume of the event horizon.?

Asked Nov 13 '19 at 13:10

Active Nov 13 '19 at 21:40

Viewed 48 times

I am looking for the average mass/energy density contained in the black hole per cubic centimeter. As if the singularity did not exist.

edited Nov 13 '19 at 21:40

asked Nov 13 '19 at 13:10

Jay Verreault

Have you tried anything so far? – Alex Robinson Nov 13 '19 at 13:31
2

You could work out a mass density from the Schwarzschild radius. In that scenario, the mass density of the black hole decreases with increasing mass. – mdavezac Nov 13 '19 at 13:46
FWIW, the Hawking radiation calculator says it's 1.84212E14 g/cm^3. But note the $M^2$ in the denominator of that formula. Big black holes have very small mean densities. – PM 2Ring Nov 13 '19 at 13:59
Possible duplicate of What is exactly the density of a black hole and how can it be calculated? – Nov 13 '19 at 14:43
This is not a duplicate. Please examine the body of the question – Jay Verreault Nov 13 '19 at 15:22
@JayVerreault: I believe that answer is within a factor of c^2 of what you want. Since $E=mc^2$, the energy density is something like $e=\rho c^2$. If you're looking for something else, you should be more specific. – levitopher Nov 13 '19 at 15:31
1

The body says “I am looking for the average mass/energy density”, and an answer for the duplicate question gives the mass density. – G. Smith Nov 13 '19 at 16:42
@JayVerreault: If it's not a duplicate, please edit the question to clarify in what way it's different. – Nov 13 '19 at 19:13
My apologies. I thought I had. I changed the heading not the body. – Jay Verreault Nov 13 '19 at 21:47
Jay, if you want to reply to people you need to use the @UserName syntax, or they won't get notified. You automatically get notified about our comments on your question because you're the author. But you haven't explained why the duplicate doesn't answer your question. And my earlier comment already states the mean density of a 1 solar mass black hole to several significant digits. What more do you want? – PM 2Ring Nov 19 '19 at 10:20

What is the energy density of a 10 solar mass black hole as if the mass is distributed throughout the volume of the event horizon.?

0 Answers0