SpECTRE
v2024.05.11
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Tag containing the first time derivative of the quadrupole moment. More...
#include <QuadrupoleFormula.hpp>
Public Types | |
using | type = tnsr::ii< DataType, Dim, Fr > |
Tag containing the first time derivative of the quadrupole moment.
For the first derivative of the quadrupole moment, we use \(\tilde{D} (v^i x^j + x^i v^j)\) (equation 23 of [164]), with \(\tilde{D}=\sqrt{\gamma}\rho W\), \(W\) being the Lorentz factor, \(\gamma\) being the determinant of the spatial metric, \(x\) the coordinates in Frame Fr, and \(v\) the corresponding spatial velocity.