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Lévy model for interstellar scintillations.

Stanislav Boldyrev1, Carl R Gwinn

  • 1Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637, USA.

Physical Review Letters
|October 4, 2003
PubMed
Summary
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Researchers propose a new model for interstellar turbulence, suggesting Lévy statistics explain anomalous pulsar signal broadening. This resolves a 30-year puzzle regarding pulsar distance scaling in interstellar scintillations.

Area of Science:

  • Astronomy and Astrophysics
  • Plasma Physics

Background:

  • Pulsar radio signals probe interstellar turbulence.
  • Interstellar medium electron density fluctuations cause pulse broadening.
  • Anomalous pulsar distance scaling in pulse broadening is unexplained.

Purpose of the Study:

  • To explain the anomalous scaling of pulsar signal broadening with distance.
  • To propose a new model for interstellar electron density fluctuations.

Main Methods:

  • Developing a new theoretical model for interstellar electron density fluctuations.
  • Analyzing the statistical properties of these fluctuations.

Main Results:

  • The proposed model explains the observed anomalous scaling with pulsar distance.

Related Experiment Videos

  • Lévy statistics, not Gaussian statistics, characterize the fluctuations.

    • Conclusions:

    • Lévy statistics provide a consistent explanation for interstellar scintillation phenomena.
    • This finding resolves a long-standing puzzle in pulsar astronomy.