Constraint damping of the conformal and covariant formulation of the Z4 system in simulations of binary neutron stars

  title={Constraint damping of the conformal and covariant formulation of the Z4 system in simulations of binary neutron stars},
  author={D. Alic and Wolfgang Kastaun and Luciano Rezzolla},
  journal={Physical Review D},
Following previous work in vacuum spacetimes, we investigate the constraint-damping properties in the presence of matter of the recently developed traceless, conformal and covariant Z4 (CCZ4) formulation of the Einstein equations. First, we evolve an isolated neutron star with an ideal gas equation of state and subject to a constraint-violating perturbation. We compare the evolution of the constraints using the CCZ4 and Baumgarte-Shibata-Shapiro-Nakamura-Oohara-Kojima (BSSNOK) systems. Second… 

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