# Derivation of the quadrupole moment of gravitational wave

1. Jan 5, 2014

### Shan K

Hi,
Can any one give a derivation of the quadrupole moment in the TT gauge ( Equation metioned below ) of the gravitational wave ?

QijTT(x) = ∫ρ(xixj-1/3δijr2)d3x
Where ρ is the matter density