SpECTRE
v2024.05.11
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Tag containing the quadrupole moment. More...
#include <QuadrupoleFormula.hpp>
Public Types | |
using | type = tnsr::ii< DataType, Dim, Fr > |
Tag containing the quadrupole moment.
The quadrupole moment is defined as \(\tilde{D} x^i x^j\) (equation 21 of [164]), with \(\tilde{D}=\sqrt{\gamma}\rho W\), \(W\) being the Lorentz factor, \(\gamma\) being the determinant of the spatial metric, and \(x\) the coordinates in Frame Fr.