TQNT-V5.9 shows that the transverse-traceless (TT) modes of the V5 χ-field reproduce the standard general-relativistic gravitational wave equation in the long-wavelength limit, with propagation speed c and quadrupolar polarisation content (h+, h×). The leading-order inspiral chirp of GW150914 is recovered exactly within the precision of the V5-derived G inherited from V5.8. No new parameter is introduced relative to V5.7-V5.8. Complements the V5 monograph (10.5281/zenodo.19131538).
Lilian Cariou (Fri,) studied this question.