The nature of Cosmic Jets

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Offline Alan McDougall

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The nature of Cosmic Jets
« on: 20/09/2008 18:04:59 »
Cosmic jets are among the most spectacular dynamical phenomena in the universe. Although jets can be found emanating from the cores of quasars and other active galactic nuclei, compact binary star systems in our Galaxy, and even regions of star formation, we do not yet understand fully how nature creates such high-energy, high-speed flows that are so well focused.

Current models involving magnetized winds accelerating along the rotational poles of disks of hot gas falling toward a black hole, neutron star, or star are difficult to test because the site where most of the "action" occurs cannot be resolved by current instruments.

How is the material in the jet energized at the base of the jet and re-energized downstream from time to time?

How are flow speeds of up to - and perhaps exceeding - 99.9% the speed of light attained in the jets?

How are individual particles accelerated to such high energies that they emit very-high energy gamma-rays?

What causes the rapid changes in brightness that seem to indicate extraordinarily high energy densities of both photons and particles?

Regards

Alan
The Truth remains the Truth regardless of our beliefs or opinions the Truth is always the Truth even if we know it or do not know it (The Truth remains the Truth)

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Offline RD

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The nature of Cosmic Jets
« Reply #1 on: 20/09/2008 20:32:01 »
The jets are focused by electromagnetic field, (which is created by rotation).
They are somewhat analogous to aurorae which occur at Earth's poles.
Earth's aurorea are caused by incoming charged particles,
 if a body with an electromagnetic field emitted charged particles they would be emitted from the poles.
« Last Edit: 20/09/2008 20:42:52 by RD »