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Elasticity of Nuclear Pasta.

M E Caplan1, A S Schneider2, C J Horowitz3

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Area of Science:

  • Astrophysics
  • Nuclear Physics
  • Materials Science

Background:

  • The elastic properties of neutron star crusts are critical for interpreting astrophysical phenomena like electromagnetic signals and gravitational waves.
  • Nuclear pasta, a phase of matter in the inner crust, significantly influences these elastic properties.

Purpose of the Study:

  • To investigate the elastic properties and breaking mechanisms of nuclear pasta using large-scale simulations.
  • To determine the potential strength of nuclear pasta under deformation.

Main Methods:

  • Classical molecular dynamics simulations were employed to deform idealized and multi-domain samples of nuclear pasta.
  • The breaking mechanisms of nuclear pasta structures were analyzed.

Main Results:

  • Nuclear pasta demonstrates exceptional strength, with a potential shear modulus of 10^30 ergs/cm^3.
  • The material exhibits a breaking strain exceeding 0.1, indicating high resilience.

Conclusions:

  • Nuclear pasta is likely the strongest known material, with implications for neutron star physics.
  • Understanding its elastic properties is essential for modeling neutron star behavior and observable phenomena.