Why do pulsars emit radiation from both poles?

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Discussion Overview

The discussion centers on the mechanisms behind pulsars emitting radiation from both poles, exploring the behavior of charged particles in the magnetic fields of neutron stars. It touches on theoretical aspects of particle movement, radiation emission, and the nature of magnetic fields.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant suggests that charged particles are accelerated along magnetic field lines from the north pole to the south pole, emitting radiation due to this acceleration.
  • There is a question about whether both protons and electrons move along the magnetic field lines and why radiation is emitted from both poles instead of just the north pole.
  • Another participant raises a concern about the behavior of positively charged particles moving against the field lines and the implications for radiation emission.
  • A participant mentions that charged particles in a magnetosphere tend to move in a helix along the magnetic field lines, which leads to synchrotron radiation being emitted along the particles' movement axis.
  • It is noted that particles can exhibit helical motion in both directions along the magnetic field lines.

Areas of Agreement / Disagreement

Participants express uncertainty regarding the specifics of particle behavior and radiation emission, with multiple competing views on the nature of charged particle movement in magnetic fields and the implications for radiation from pulsars.

Contextual Notes

There are unresolved questions about the definitions of direction in magnetic fields, the role of electric fields in the magnetosphere, and the interactions between different charged particles.

Who May Find This Useful

Readers interested in astrophysics, particularly those studying neutron stars, pulsars, and the behavior of charged particles in magnetic fields.

rnielsen25
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Hi everyone,

The charged particles in the magnetic field around the neuton star, is accelerated along the magnetic field lines, which would go in a curve, from the north pole to the south pole. Due to the acceleration the particles will emit radiation, along their movement axis, and because the field lines is strongest at the poles, this is why we say they emit radiation from the poles.

But do both protons and electrons move along the magnetic field lines, or is it only the electrons? If both move along, why does a pulsar emit radiation from the south pole, and not only from the north pole? What i mean, is when the particles move towards the south pole, wouldn't they emit radiation toward the pole too, and not away from the star as on the north pole.

And if the positively charged particles move the other direction against the field lines, wouldn't they crash together and literally **** everything up? But what i thought i understood, is that both move along the field lines, but have opposite rotation around the field lines.

One thing more. If i understood this right, so the reason the particles is getting in the magnetosphere, is around the neutron star, a electric field occurs due to the plasma beeing accelerated around in the magnetosphere. This accellerates the electric charged particle up in the magnetic field. But if this is correct, how does that work in any way? I mean if, at first it is electrons who is in the plasma, then wouldn't the protons be accelerated up in the magnetosphere and align the electric potential? So how can a electric field occur?
 
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Why would you expect particles or radiation to follow our (human) arbitrary definition of "direction" (N->S) of field lines?
 
Well, i can't explain why. But like on earth, it seems like when charged particles is in a magnetosphere, they have a tendency to move in a helix along the magnetic field lines. This creates something called synchrotron radiation, where the photons is radiated along the particles movement axis.
 
Right, and particles can have this helix in both directions.
 

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