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Related Experiment Videos

Are pulsar glitches triggered by a superfluid two-stream instability?

N Andersson1, G L Comer, R Prix

  • 1Department of Mathematics, University of Southampton, Southampton SO17 1BJ, United Kingdom.

Physical Review Letters
|April 12, 2003
PubMed
Summary

Superfluid neutron stars may experience glitches due to a two-stream instability, a novel mechanism relevant to pulsars and laboratory superfluid experiments.

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Area of Science:

  • Astrophysics
  • Nuclear Physics
  • Condensed Matter Physics

Background:

  • Neutron stars are known to possess superfluid components.
  • Observed pulsar glitches provide strong evidence for these superfluid properties.

Purpose of the Study:

  • To describe a superfluid analog of the two-stream instability.
  • To argue for the relevance of this instability in neutron stars.
  • To propose a new physical mechanism for pulsar glitches.

Main Methods:

  • Theoretical description of a superfluid two-stream instability.
  • Analysis of its potential applicability to neutron star interiors.

Main Results:

  • A superfluid analog of the two-stream instability is described.

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  • Arguments are presented for its likely relevance in neutron stars.

    • Conclusions:

    • The described instability offers a new physical mechanism potentially explaining pulsar glitches.
    • This mechanism may also be relevant for laboratory experiments with superfluid systems.