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Related Experiment Videos

Radio Pulsar Death Line Revisited: Is PSR J2144-3933 Anomalous?

Zhang, Harding, Muslimov

    The Astrophysical Journal
    |February 26, 2000
    PubMed
    Summary

    We reinvestigated pulsar death lines using polar cap acceleration models. The inverse Compton scattering-induced space-charge-limited flow model explains radio-loud behavior in long-period pulsars like PSR J2144-3933.

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    Area of Science:

    • Astrophysics
    • Plasma Physics

    Background:

    • Pulsar radio emission is limited by
    • death lines
    • which define conditions for particle acceleration and pair production.
    • Existing models struggle to explain radio-loud behavior in some long-period pulsars.

    Purpose of the Study:

    • To reinvestigate pulsar death lines.
    • To explore the role of different polar cap acceleration models and pair production mechanisms.
    • To explain the radio-loudness of pulsars like PSR J2144-3933.

    Main Methods:

    • Utilized two polar cap acceleration models: vacuum gap and space-charge-limited flow.
    • Considered curvature radiation and inverse Compton scattering as pair production sources.
    • Incorporated general relativistic frame dragging into the models.

    Main Results:

    • The inverse Compton scattering-induced space-charge-limited flow model supports significant pair production.
    • This model can explain radio-loudness in long-period pulsars.
    • PSR J2144-3933 can be radio loud without special neutron star properties.

    Conclusions:

    • The inverse Compton scattering-induced space-charge-limited flow model offers a viable explanation for pulsar radio emission.
    • This framework resolves discrepancies for long-period, radio-loud pulsars.
    • It provides a more comprehensive understanding of pulsar magnetospheres.

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