Timeline for If two black hole event horizons overlap (touch) can they ever separate again?
Current License: CC BY-SA 4.0
17 events
| when toggle format | what | by | license | comment | |
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| Jul 1, 2019 at 6:00 | history | tweeted | twitter.com/StackAstronomy/status/1145572897429344256 | ||
| Jun 26, 2019 at 15:41 | comment | added | Tomáš Zato | Strange, I asked pretty much the same question on physics and was voted down to hell. | |
| S Jun 26, 2019 at 15:35 | history | suggested | Toby Speight | CC BY-SA 4.0 |
Fixed typos
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| Jun 26, 2019 at 14:57 | review | Suggested edits | |||
| S Jun 26, 2019 at 15:35 | |||||
| Jun 26, 2019 at 1:58 | comment | added | uhoh | @eirikdaude I disagree with that, see Should this question about touching event horizons really be closed as duplicate? | |
| Jun 25, 2019 at 16:12 | comment | added | PM 2Ring | FWIW, there was a thread on xkcd a month or two ago related to this topic: Is it possible to escape from a black hole using another black hole? | |
| Jun 25, 2019 at 15:28 | answer | added | Mads Aggerholm | timeline score: 69 | |
| Jun 25, 2019 at 7:30 | review | Close votes | |||
| Jun 26, 2019 at 20:11 | |||||
| Jun 25, 2019 at 7:14 | comment | added | eirikdaude | Possible duplicate of highspeed black holes or neutron stars on (almost) head-on collision course and kinetic energy | |
| Jun 25, 2019 at 5:48 | history | became hot network question | |||
| Jun 25, 2019 at 0:03 | answer | added | Florin Andrei | timeline score: 56 | |
| Jun 24, 2019 at 22:54 | comment | added | PM 2Ring | But yes, they should merge, AFAIK, radiating a scary amount of the KE away in gravitational waves. They can't keep it because they have to lose the angular momentum somehow. | |
| Jun 24, 2019 at 22:51 | comment | added | PM 2Ring | Well, SMBHs do tend to be rotating fairly close to the limit anyway, so that's not unrealistic, unlike the relative speed you've given them. ;) But it's going to make an already difficult calculation even harder. There's no analytical solution to the general 2 body problem in GR, so you have to resort to numerical methods, and trying to handle a pair of SMBHs at relativistic speed will require some very heavy number crunching just to get an estimate that's vaguely trustworthy. | |
| Jun 24, 2019 at 22:37 | comment | added | Loadwick | To also spice things up further lets say they are already rotating at the Kerr's limit in opposite directions to each other so when they touch its very messy from an angular momentum conservation point of view. | |
| Jun 24, 2019 at 21:57 | comment | added | PM 2Ring | FWIW, If they were heading exactly towards each other, their relative speed would be 180c/181, about .9945c. According to vttoth.com/CMS/physics-notes/311-hawking-radiation-calculator their EH radius is about 9853 light-seconds. And don't forget they have a huge relative angular momentum too. | |
| Jun 24, 2019 at 21:30 | review | First posts | |||
| Jun 25, 2019 at 2:37 | |||||
| Jun 24, 2019 at 21:26 | history | asked | Loadwick | CC BY-SA 4.0 |