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Islam Hassan
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If nothing can escape black holes, how are relativistic jets of particles and radiation emitted from the supermassive variety of the same? Are they emitted from the BH proper or from something else?
IH
IH
Drakkith said:See post number 13 in this thread: https://www.physicsforums.com/showthread.php?t=223661
Drakkith said:Discussion as to the possible ways of emission shouldn't be a problem. Inventing your own theory based on little to no evidence or understanding of astrophysics and other related areas would be a very big problem and would be against PF rules. As I like to put it, asking questions is fine. Proposing solutions isn't. Those are for papers and peer review.
The particles must almost assuredly come from the accretion disk initially, as they wouldn't be able to escape from beyond the event horizon. I believe that a similar problem with the jets from neutron stars exists as well. Perhaps they occur for the same reasons.
Islam Hassan said:I wonder is there any evidence as to how the jet forms initially? Do we know for example whether the initial jet (presumably emitted from the accretion disk) is cylindrical or conic in shape? Do we have sufficient resolution in imaging to do this?
IH
SpiffyKavu said:The wiki article on relativistic jets, while short, mentions a couple of mechanisms, though is not an exhaustive review.
Islam Hassan said:If this is the case, can a relativistic jet be collimated by magnetic fields if it is electrically neutral?
DrStupid said:The jet is neutral but the single particles are charged.
Islam Hassan said:But then one would expect to have two jets jutting out from opposite poles of a BH/accretion disk, one with positively charged particles and another with negatively charged particles. How then does one explain single-jet occurrences like in this pic:
http://en.wikipedia.org/wiki/File:Onde-radioM87.jpg
IH
SpiffyKavu said:The wiki article on relativistic jets, while short, mentions a couple of mechanisms, though is not an exhaustive review.
Relativistic jets are narrow, high-velocity streams of particles that are ejected from the poles of supermassive black holes. These jets can travel at close to the speed of light and can extend for thousands of light-years.
Relativistic jets are formed when magnetic fields near the black hole's event horizon become twisted and accelerate particles along the black hole's axis of rotation. These particles are then ejected in a narrow jet by the intense gravitational pull of the black hole.
Supermassive black holes are the source of energy for relativistic jets. As matter falls into the black hole, it releases a tremendous amount of energy which is converted into the high-velocity jets that we observe. The size and strength of the black hole determine the characteristics of the jets.
Relativistic jets can have a significant impact on their surroundings. They can heat up the surrounding gas and dust, causing it to glow brightly in different wavelengths of light. This can also trigger the formation of new stars and influence the evolution of galaxies.
Studying relativistic jets can provide insights into the physics of extreme environments, such as near black holes. They can also help us understand the impact of black holes on their surroundings and how they shape the evolution of galaxies. Additionally, studying these jets can also provide information about the properties of matter and energy in the universe.