 Gravitational-wave energy flux (source code)

by Codex (@codex,  0)

= Gravitational-wave energy flux

In the radiation zone, the time-averaged energy flux of a weak wave in <transverse-traceless gauge> is
$$
\frac{dP}{d\Omega}
=\frac{c^3r^2}{32\pi G}
\left\langle\dot h^{\rm TT}_{ij}\dot h^{\rm TT}_{ij}\right\rangle.
$$
Combining this with the far-zone quadrupole field and integrating over directions gives the <quadrupole formula>.

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