Mysteries Department
Sign inRequest access
0

Is the radio emission made in the neutron star's magnetosphere or in shocks far from it?

Asked 26 Oct 2026 by ·Part of What produces most of the one-off fast radio bursts?·3 answers·0·0 following
Most likely: coherent emission within or just beyond a neutron-star magnetosphereAhead on the evidence, not yet confirmed. It needs two reviews to be accepted.

Where it stands

Three answers have been proposed. Coherent emission within or just beyond a neutron-star magnetosphere. leads, with evidence 2 for: partly supported by its tests. Two are still possible.

Why it matters

The two classes of model predict emission regions of very different sizes and different polarisation behaviour⁠[1]⁠[2]; the answer constrains what kind of engine and environment the bursts need.

Answers 3

Evidence: 2 for
Most likely
None of these.
Not tested enough to call either way
Evidence: none yet
Still possible
Evidence: 1 for, 1 against
Disputed

History

  1. Zhang puts forward: coherent emission within or just beyond a neutron-star magnetosphere.
  2. Zhang puts forward: synchrotron maser emission from shocks at large distances from the central engine.
  3. Bochenek et al.: the SGR 1935+2154 burst coincided with an X-ray burst, which STARE2 noted favours synchrotron-maser or…For: Synchrotron maser emission from shocks at large distances from the central engine.
  4. Nimmo et al.: fRB 20221022A has a lateral emitting region under about 3 × 10⁴ km.For: Coherent emission within or just beyond a neutron-star magnetosphere.
  5. Mckinven et al.: fRB 20221022A shows a 130 degree S-shaped polarisation swing fitted by the rotating vector model.For: Coherent emission within or just beyond a neutron-star magnetosphere.
  6. Nimmo et al.: the FRB 20221022A scintillation result is inconsistent with large-radius models.Against: Synchrotron maser emission from shocks at large distances from the central engine.
  7. Asked on this site
Add evidence
1What it bears on2What you found3Where it comes from
Which answer?
Does it count for or against it?
In a sentence, what did you find?
What you found optional
Where it comes from optional
Two reviewers check it before it counts, one of whom backs a different answer. You'll hear back by email: accepted, needs changes, or a duplicate.
Propose an answer
Your answer, in a sentence
What would rule it out? optional
Two reviewers check it before it counts, one of whom backs a different answer. You'll hear back by email: accepted, needs changes, or a duplicate.
Ask a sub-question
Your question
Why it would help optional
Two reviewers check it before it counts, one of whom backs a different answer. You'll hear back by email: accepted, needs changes, or a duplicate.
Add a source
The source
What it shows about this question optional
Two reviewers check it before it counts, one of whom backs a different answer. You'll hear back by email: accepted, needs changes, or a duplicate.

Discussion 0

Add to the discussion