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Can dark matter explain the braking index of neutron stars?

Chris Kouvaris1 and M. Ángeles Pérez-García2,*

  • 1CP3-Origins, University of Southern Denmark, Campusvej 55, Odense 5230, Denmark
  • 2Department of Fundamental Physics and IUFFyM, University of Salamanca, Plaza de la Merced s/n, 37008 Salamanca, Spain

  • *mperezga@usal.es
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Phys. Rev. D 89, 103539 – Published 29 May, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.103539

Abstract

We explore a new mechanism of slowing down the rotation of neutron stars via accretion of millicharged dark matter. We find that this mechanism yields pulsar braking indices that can be substantially smaller than the standard n∼3 of the magnetic dipole radiation model for millicharged dark matter particles that are not excluded by existing experimental constraints thus accommodating existing observations.

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Phys. Rev. D 89, 103539– Published 29 May, 2014
  • Received 17 January 2014

© 2014 American Physical Society

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