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Pinning down the superfluid and measuring masses using pulsar glitches.

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Pulsar glitches may originate from the star's core superfluid reservoir, not just the crust. This research validates a core superfluid model using 45 years of data, advancing our understanding of neutron stars.

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Area of Science:

  • * Astrophysics
  • * Nuclear Physics
  • * Condensed Matter Physics

Background:

  • * Pulsars exhibit precise timing, but glitches disrupt this regularity, particularly in young stars.
  • * Glitches are traditionally attributed to superfluid-crust interactions, but some pulsars require larger superfluid reservoirs than the crust can provide.
  • * This discrepancy suggests alternative superfluid reservoirs, such as the pulsar core, may be involved.

Purpose of the Study:

  • * To investigate a model where pulsar glitches are caused by superfluid reservoirs in the star's core.
  • * To test various theoretical superfluid models against extensive pulsar glitch data.
  • * To develop a novel method for measuring pulsar masses using combined radio and X-ray observations.

Main Methods:

  • * Analysis of 45 years of observational glitch data from pulsars.
  • * Comparison of theoretical superfluid models with empirical glitch data.
  • * Development of a new technique combining radio and X-ray data for pulsar mass determination.

Main Results:

  • * Only one theoretical superfluid model successfully explains up to 45 years of pulsar glitch data.
  • * The study supports the hypothesis that glitches tap into a superfluid reservoir located in the pulsar's core.
  • * A new method for measuring pulsar masses using multi-wavelength data has been established.

Conclusions:

  • * Pulsar glitches are likely driven by superfluid reservoirs in the core, not solely the crust.
  • * The validated core superfluid model provides a robust explanation for long-term glitch behavior.
  • * The developed mass measurement technique enables probing fundamental physics, including core superfluidity, with current and future telescopes.