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Detecting dark matter with imploding pulsars in the galactic center.

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Dark matter accumulating in neutron stars could explain the lack of old millisecond pulsars near the Milky Way's galactic center. This dark matter clump can cause pulsars to collapse into black holes, destroying them.

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Area of Science:

  • Astrophysics
  • Particle Physics
  • Cosmology

Background:

  • The galactic center has a surprising lack of old millisecond pulsars.
  • Neutron stars are dense objects that could accumulate dark matter.

Purpose of the Study:

  • To investigate if dark matter accumulation can destroy neutron stars, explaining the observed pulsar paucity.
  • To identify dark matter properties consistent with this hypothesis and astronomical observations.

Main Methods:

  • Simulating dark matter accumulation within neutron stars.
  • Comparing model predictions with observations of millisecond pulsars in the galactic center, globular clusters, and near the solar position.
  • Analyzing the dependence of pulsar collapse on dark matter density and velocity dispersion.

Main Results:

  • Dark matter accumulation can cause neutron stars to exceed the Schwarzschild limit and collapse into black holes.
  • Specific dark matter models and parameter spaces are identified where pulsar destruction is significant.
  • Pulsar collapse age is inversely proportional to dark matter density and linearly proportional to velocity dispersion.

Conclusions:

  • Dark matter's gravitational effects on neutron stars offer a potential explanation for the galactic center's pulsar deficit.
  • The spatial distribution of pulsar ages within the Milky Way's dark matter halo is model-dependent.
  • This mechanism highlights a novel way to probe dark matter properties through neutron star evolution.