What if a black hole met an antimatter black hole?

July 27, 2015 by Fraser Cain, Universe Today

I've wondered out loud how it might be possible to destroy a black hole because I talk to myself and sometimes there's a camera watching.

I've suggested a bunch of crazy ideas, like blasting it with rockets, shooting lasers at it, smashing planets into it. Nothing would work, everything would just make it bigger and angrier.

Turns out the only way to defeat a black hole is to sit on your hands and wait for it to evaporate. That's not really helpful if you're getting pulled into the black hole, and have sense of immediacy about it.

I mentioned one idea, antimatter, and dismissed it as just another hopeless convertand pointless way to enflame this galactic monstrosity.

But wait, you say, isn't antimatter the opposite of regular matter. If you add a positive number and a negative number together, don't they just cancel each other out?

Why won't that green blooded pointy-eared hobgoblin of a science officer back me on this one?

Why can't you just pump antimatter in to cancel out the regular matter of the black hole and cut a path to escape?

Antimatter is exactly the same as regular matter, except everything is backwards. Electrical charges, spin directions, and configuration of all the sub-particles that make it up. It's all backwards.

Everything is opposite, except for mass. An anti-electron has the exact same amount of mass as electron.

Here's the part you care about. When equal amounts of matter and antimatter collide, they are annihilated. But not disappeared or canceled out. They're converted into pure energy.

As Einstein explained to us, mass and energy are just different aspects of the same thing. You can turn mass into energy, and you can turn energy into mass.

Black holes turn everything, both matter and energy, into more black hole.

Imagine a regular flavor and an antimatter flavor black hole with the same mass slamming together. The two would be annihilated and turn into pure energy.

Of course, the gravity of a black hole is so immense that nothing, not even light can escape. So all energy would just be turned instantaneously into more black hole. Want more black hole? Put things into the black hole.

If these two objects came together, you'd end up with a black hole with twice the mass that you had before.

Also, creating an antimatter black hole would be expensive. Antimatter is produced in particle accelerators, protons are accelerated in an enormous ring, pushed to nearly the speed of light, and then smashed into each other's faces.

The collective momentum of the particle is converted into using Einstein's famous e=mc2 calculation. Each collision creates a tiny handful of particles that could be collected and contained in a magnetic field to hold them in place and keep them from being annihilated.

According to NASA, a single gram of antihydrogen would cost about $62.5 trillion to create, the most expensive material we could possibly make on Earth.

It could be more expensive than that. It's possible that the Large Hadron Collider is capable of creating , although none have been created yet. If physicists could work out that math, then you could create microscopic antimatter by smashing together anti-hydrogen particles, and the costs involved would dwarf the production of antimatter itself.

The bottom line is: If a regular black hole and an antimatter black hole got black-hole-married in space, they wouldn't vanish.

Feeding in antimatter won't do any good, it's just like regular matter or energy. It only makes the black hole more massive. That should save you some money in wasteful antimatter production.

You're welcome. And I'm sorry. Farewell traveler, your stores won't save you now.

Explore further: Video: How do black holes evaporate?

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6 comments

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Milou
not rated yet Jul 27, 2015
That is the point where it does not "matter" anymore
TheGhostofOtto1923
1 / 5 (1) Jul 27, 2015
blasting it with rockets, shooting lasers at it, smashing planets into it
??? Frazer ought to do a search before writing an article.

"What physicists would like, therefore, is way to get rid of the event horizon and expose the inner workings to proper scrutiny. Doing this would destroy the black hole but reveal something far more bizarre and exotic.

"Today, Ted Jacobson at the University of Maryland and Thomas Sotiriou and the University of Cambridge explain how this might be done in an entertaining and remarkably accessible account of the challenge.

"Getting rid of the event horizon is simply a question of increasing the angular momentum and/or charge of this object until the inequality is reversed. When that happens the event horizon disappears and the exotic object beneath emerges."
big_hairy_jimbo
not rated yet Jul 27, 2015
Interesting Ghost.

I'll hazard a guess that the object beneath is a Quark Star. A ball of Quark Gluon Plasma.

To me that seems the next logical step in the Stellar collapse sequence after a Neutron Star.
TheGhostofOtto1923
1 / 5 (1) Jul 27, 2015
Interesting Ghost.

I'll hazard a guess that the object beneath is a Quark Star. A ball of Quark Gluon Plasma.

To me that seems the next logical step in the Stellar collapse sequence after a Neutron Star.
-Or you could drop that excerpt into google and find out what real physicists think it is.
Mimath224
not rated yet Jul 28, 2015
Ha! The '...bottom line...' is, don't wonder out loud and do '...sit on...' your hands and wait...can someone tell how sitting on your hands work for BH destruction...just joking.
FC doesn't seem to have read 'Destroying black holes with test bodies' @ arXiv:1006.1764 Ha!
big_hairy_jimbo
not rated yet Jul 28, 2015
Hmmm @TheGhost, well I found info on Quark stars, and Strange (Quark) Stars, I also found an article (http://arxiv.org/...0702671) suggesting that a black hole could either collapse into a singularity or explode leaving a Quark Star core behind.
So I don't think I was too far adrift Ghost!!

Trying to think of solutions that don't involve a singularity, since that is where known physics breaks down, and is therefore useless for predictions.

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