4.8 Article

Vortex Pinning and Dynamics in the Neutron Star Crust

Journal

PHYSICAL REVIEW LETTERS
Volume 117, Issue 23, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.232701

Keywords

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Funding

  1. Polish National Science Center (NCN) [UMO-2013/08/A/ST3/00708]
  2. Polish NCN [UMO-2014/13/D/ST3/01940]
  3. Department of Energy (DOE) Office of Science User Facility [DE-AC05-00OR22725]
  4. Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
  5. U.S. DOE Office of Science [DE-FG02-97ER41014]
  6. Washington State University (WSU) New Faculty Seed Grant

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The nature of the interaction between superfluid vortices and the neutron star crust, conjectured by Anderson and Itoh in 1975 to be at the heart vortex creep and the cause of glitches, has been a long-standing question in astrophysics. Using a qualitatively new approach, we follow the dynamics as superfluid vortices move in response to the presence of nuclei (nuclear defects in the crust). The resulting motion is perpendicular to the force, similar to the motion of a spinning top when pushed. We show that nuclei repel vortices in the neutron star crust, and characterize the force per unit length of the vortex line as a function of the vortex element to the nucleus separation.

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