Timeline for Does every black hole have its mass within its Schwarzschild radius?
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9 events
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| Apr 24, 2021 at 14:50 | comment | added | safesphere | @A.V.S. Thanks! So all answers and comments claiming that the mass is inside the horizon are wrong. | |
| Apr 24, 2021 at 8:37 | comment | added | A.V.S. | @safesphere: “Mass” in GR is not a local quantity, it is determined by the geometry itself and not by “something” in geometry, moreover there is no single definition of quasilocal mass. | |
| Apr 24, 2021 at 4:14 | comment | added | safesphere | @A.V.S. Do you agree the BH mass is inside the horizon? Nothing inside can have any effect on anything outside just like tomorrow's rain can't make you wet today. If there weren't anything inside at all, we wouldn't be able to tell a difference. It sounds to me like 8 wrong answers here. No? | |
| Apr 21, 2021 at 14:44 | comment | added | A.V.S. | @mmeent Komar mass might be constrained to the event horizon, but this is not the only possible quasilocal measure of energy of black hole. There is e.g. Brown–York QL energy and the Martinez's conjecture about its properties for rotating black hole. | |
| Apr 21, 2021 at 9:44 | comment | added | Andrew Steane | "The stress-energy is zero everywhere" is not established because it breaks down as one approaches the singular behaviour where all such statements become questionable (along with the field eqn itself). Also "we do not have any well-defined way to localise where that mass is" is a little misleading I think, because we can make energy conservation arguments (Komar mass) for Schw. case, showing that energy falling into the horizon stays there and results in the appropriate increase in $m$. | |
| Apr 21, 2021 at 8:22 | comment | added | TimRias | It also ignores that for a stationary spacetimes we do have a quasi local measure of mass in the form of the Komar mass. The Komar mass is unambiguously constrained to be within the event horizon. | |
| Apr 21, 2021 at 8:15 | comment | added | Mauro Giliberti | This is a great answer, addressing the problem from an interesting perspective, but I'm afraid it's not what OP meant. | |
| Apr 20, 2021 at 23:48 | review | First posts | |||
| Apr 21, 2021 at 1:29 | |||||
| Apr 20, 2021 at 23:44 | history | answered | user296851 | CC BY-SA 4.0 |