Black Hole Particle Jets Explained

Screaming Cactus writes "A team of researchers led by Boston University's Alan Marscher have apparently worked out the physics behind the particle streams emanating from many black holes. According to the researchers, 'twisted, coiled magnetic fields are propelling the material outward.' By watching an 'unprecedented view' of a black hole in the process of expelling mass, they were able to confirm their theory, predicting where and when bursts of energy would be detected."

Comments

Re:Hawking Radiation

[PhuCknuT]

Yes, this is completely different, but it's not exactly the black hole emitting anything. The jets are from material that hasn't fallen into the black hole yet, being accelerated along the axis of rotation by the twisted magnetic fields outside the black hole.

Re:Hawking Radiation

[ekstrom]

This is radiation from the accretion disk, which both supplies the material and twists up the fields which then accelerate the material. It's not from the hole itself. Of course it is all powered by the hole's gravitational field.

Re:Hawking Radiation

[Jugalator]

These particle jets aren't emitted from the actual "depths" of a black hole, but as the article says, ejected due to twisted magnetic fields perpendicular to its accretion disk. Once you get closer, space bends even the magnetic fields inwards, and everything else. And what goes that far is later emitted as Hawking radiation, the only form of energy theorized to be emitted from a black hole, in time believed to "evaporate" the black hole itself.

Re:The scatological aspects of astronomy.

[oodaloop]

Ok, so its juvenile and stupid. Not really. You may not be aware, but one of the reasons the term Black Hole stuck around was to annoy French astrophysicists (the term translates to a bodily orafice in French). The question was later posed (by Wheeler, I believe) as to whether black holes have 'hair', meaning do they give off observable radiation or other phenomena, much to the chagrin of his French counterparts. The question was posed, FWIU, mostly just so American physicists could snicker while French physicists had to talk about black holes and hair in public conferences. And it turns out that yes, black holes do in fact have hair.

Now we have black holes expelling mass. I'm sure you're not the only one finding this humorous.

Re:Hawking Radiation

[evanbd]

Well, large black holes don't evaporate -- even the cosmic background radiation is enough to add more mass than they lose to Hawking radiation. The CMB is at ~2.7K, and a 1 solar mass black hole has a temperature of 60nK from the Hawking radiation.

Re:The scatological aspects of astronomy.

[The Only Druid]

Didn't he say that matter could NOT escape a black hole? This isn't matter escaping a black hole. This is matter, outside the black hole, being accelerated and hurtled outwards by the forces of the black hole.

I am french that is not informative

[aepervius]

Black hole translate to "trou noir", which is as funny (or unfunny) as "black hole" is in english. I don't ever recall an astrophysicists in France which was annoyed, or amused. I would REALLY like to see a reference to this.And to the moderator, such an assertion would require at least a lnik or reference to be modded informative +5. Right now at best it is only +5 funny.