Simulations of black holes eating one another

It’s Friday, so my mind went here:

“…black holes eating one another”

Black hole 69?

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Yes. 

The reason why the black holes spiral closer instead of infinitely spinning around each other is due to the system radiating gravitational waves and losing energy in the process. When the two masses stop, a ton of energy gets dissipated out into space as gravitational radiation as well.

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Despite my wimpy math skills, at the very least I know that to be an understatement of shocking proportions. I run BOINC and have it calculating for the LIGO project, among others, so it’s amazing to see this previously all-theory idea come to fruition.

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“I’ll show you my event horizon if you show me yours.”

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I have it on my phone my computers not on often or long enough to make it worth while.

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Gives a new meaning to naked singularity.

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Where I used to run it all the time and everywhere I could, I stopped doing that a few years back for various reasons. I now run it regularly on a small backup server at home, and rarely to never on my local computer, but it still is a premise and process I enjoyed. Ideally I want to setup a solar-powered BOINC system, but that’s yet to come together.

To my amazement and chagrin, the small network of computers running at-the-time WinNT at the USAF freight terminal at Kuwait International Airport (KWI) was running BOINC up to 2010, last I checked–I may or may not have set that up, sorry Captain–but hey, how much of that security hole is on me, and how much is on the IT staff not looking into a small network of USAF computers STILL running WinNT? I was last there circa '97? '98? :confused:

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So check if they’ve noticed it, if not quake server?

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Sorry mods, OT:

HA! I never bothered with that at KWI as the machines couldn’t cope and 1) the Captain looked askance at anything non-spreadsheet, 2) I wasn’t in the office enough to play, most times, but mostly, 3) the LT was a cold white xtian evangelist jackass that I couldn’t stand, but he stayed in the office all the time due to heat and his constantly being underfoot on the flightline. Good Christ he was a useless son of a bitch.

Me: Hey LT, please move to the building.
LT: Why? What’s wrong with me being here?
Me: That jet needs to taxi through here and we’re waiting on you (left unsaid: you fucking fucking fucking moron how do you not hear or see that godamn huge cargo aircraft coming this way you unkempt, noisy little waste of good oxygen!!!)


Black hole question: At some point in the merging of two black holes, I would think there might come a moment when a particle is suspended between the two event horizons. What happens then? Ripped asunder, down to gluons or whatevs?

Are gravitational waves the only result of such a merger? Any other particles or waves? If it happened at the center of our galaxy, could we expect the Gravitational of All Gravitational Waves to crush or otherwise disturb the planet?

Also, if that’s the case, can we NOT remake Armageddon’s sopping oatmeal-mushy and scientifically-ludicrous movie about that event?

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Guessing if the black holes are surrounded by dust a violent event like a merger would probably lead to large amounts of light x rays etc thrown out.

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See, I already knew that. Give me more!

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I’ll try to bake some expectation of that event into my individual atoms as I don’t think any larger part of me will be around at that point.

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“What actually transpires beneath the veil of an event horizon? Decent people shouldn’t think too much about that.”

-Academician Prokhor Zharahav

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Leave it to the rest of us then.

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Depends on the size of a particle, something like a proton would survive until well within the event horizon for stellar mass black holes, whereas humans couldn’t even get close to the event horizon without getting ripped apart. Not that small size helps much: for stellar mass black holes it only takes a few milliseconds to travel from the event horizon to the singularity. There’s nothing locally special about the spacetime at the event horizon, it’s much like the spacetime just outside the event horizon and just inside the event horizon.

The usual coordinate system for an isolated non-rotating black hole (the Schwarzschild metric) has a coordinate singularity at the event horizon. This makes it look like something is happening to the spacetime at the event horizon, but is instead an artifact of the coordinate system. There are alternate coordinate systems without this event horizon singularity. One effect that is a real physical effect though is that the image of an object falling through the event horizon does redshift into invisibility to an outside observer. This isn’t something that is apparent to someone falling through the event horizon themselves and isn’t a local effect, you see it when you raytrace the image back out away from the black hole through the global spacetime.

I’ve been following numeric relativity with some interest (@relativitypaper is a good resource), though the math is beyond me.

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Hey everybody: What’s the difference between Donald Trump and a black hole?

Donal Trump has hair. Bam!

He’s quoting Sid Meier’s Alpha Centauri

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Well…

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That’s an old debate which can’t really be settled without a verifiable theory of quantum gravity. That said, my money’s on no information surviving. Hasn’t stopped me from writing fanciful tales about black hole computers though :stuck_out_tongue_winking_eye:

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So next year? Year after?

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