I wouldn't call Hawking radiation "matter," but okay.

edit: Oh, we're talking about matter in the halo.

TIL how the rapture works.

Did you read the article in the link?

Yup, that's why I made an edit.

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"Hold on guys let me just burp up a sun"

Seriously, though: what a time to be alive.

This is a terribly written article. The black hole has not 'devoured' the star. It hasn't crossed the event horizon. Best you could say is it's on the spoon making airplane noises on the way to being devoured.

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How did you determine the star was not devoured?

Nothing can escape the event horizon by definition. Not even light. That means anything being ejected from the vicinity of a black hole hasn't yet passed the event horizon.
This includes hawking radiation btw. That does not come from beyond the event horizon either. It happens when a particle/anti-particle pair is spontaneously created just outside the event horizon and before they can recombine, the anti-particle falls into the black hole and the particle escapes.
EDIT: someone correct me here plz. I'm getting flashbacks that the pair creation thing is different from hawking radiation but I don't know enough to be sure.

That's still pretty fascinating. Can particles just spontaneously appear out of nowhere? Do they exist just outside the event horizon for years. Why is the force applied away from the black hole and not towards it?

Yes they can be created spontaneously .. but only for very brief periods while the universe isn't paying attention. Then they recombine and the ledger is balanced. What is possible near the event horizon, is the anti-particle can cross the event horizon leaving the normal particle outside. It can escape (it also might not, but it can). If it does then the books still balance because the anti-particle robs the black hole of the exact mass of the particle.

Not sure what you mean by 'force applied away from the black hole'.

The article suggest that the particles are being ejected away from the black hole. What force cause the particles to drive away from the black hole and not into it? Is it reacting off the anti particle?

Can spontaneous particle creation be replicated using tech?

The ones in the article are 'regular' matter that is in the accretion disk. That's ejected by centripetal force. Gets sucked in close and some of it loses angular momentum and falls into the hole. Some of it gains that same momentum and is flung out.
As for replicating particle creation, I don't think so, but I'm not 100% sure of this stuff. I went back and edited the original because your questions are triggering some vague memories that I might be conflating different things.

Didn't mean to drill ya. Thanks for responding!

No, it's good. It makes me question what I think I know.

The Black Hole: "Well I wasn't expecting the Spanish Inquisition."

Particles are constantly appearing and annihilating, even in front of your face right now. It's called vacuum energy.

https://en.m.wikipedia.org/wiki/Vacuum_energy

>Vacuum energy can also be thought of in terms of virtual particles (also known as vacuum fluctuations) which are created and destroyed out of the vacuum. These particles are always created out of the vacuum in particle–antiparticle pairs, which in most cases shortly annihilate each other and disappear. However, these particles and antiparticles may interact with others before disappearing, a process which can be mapped using Feynman diagrams.

The process involving black holes is called hawking radiation.

https://en.m.wikipedia.org/wiki/Hawking_radiation

Nothing escapes the inside of the black hole, that's not a disputed theory, the article is referring to stuff in its accretion disk

And Hawking radiation does not come from the inside, it's more complicated than that

> Nothing can escape the event horizon by definition. Not even light.

Leonard Susskind made a career of working on that issue. From fixing sinks, to winning a bet with Hawking.

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You mean lil black holey didn't have an upset tum tum from too many starry stars?

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LOL - literally nothing escapes a black hole.

Hawking radiation does not escape a black hole. It exists only because nothing can escape a black hole. The particle is created on the outside of the event horizon while the antiparticle is created on the inside of the event horizon and can't escape to destroy the matching particle

Stellar masses that are ejected don't pass the event horizon either. It doesn't escape, it gets whirl-pooled around it and thrown out before it gets sucked in.

So, yes, nothing can escape a black hole. But your statement is incomplete.

Instead, say "nothing can escape a black hole once it has passed the event horizon."

I mean time slows down near a black hole due to the extremely strong gravitational field of the black hole. Given the theory of general relativity this is due to the gravity curving literally everything around it in a way that affects our ability to measure time and space.

So I mean technically things exist for a longer period of time than we can truly process because either we accept that there's a distortion and our technology hasn't advanced enough or that time is inherently slower there and things entering a black hole entered it long before we even know it entered.

To answer the latter question (someone else may have already answered it) "As black holes gobble up the matter in their surroundings, they also spit out powerful jets of hot plasma containing electrons and positrons, the antimatter equivalent of electrons. Just before those lucky incoming particles reach the event horizon, or the point of no return, they begin to accelerate. Moving at close to the speed of light, these particles ricochet off the event horizon and get hurled outward along the black hole's axis of rotation."

Cendes and her team determined that this material is being ejected from the black hole at around 300 million mph (480 million kph) — about half the speed of light. For comparison, TDEs usually spit out this material at about 10% the speed of light.

So it’s traveling much faster then previous observed half the speed of light , wouldn’t we as the “stationary observer” observe the second part of the event of it slingshotting away from the event horizon later to preserve relativity? And see it a few years later?

“Black-hole-regurgitation” sounds nasty AF.