The Jet-Disk Coupling of Seyfert Galaxies from a Complete Hard X-ray
  Sample
  We analyze the jet-disk coupling for different subsamples from a complete
hard X-ray Seyfert sample to study the coupling indices and their relation to
accretion rate. The results are: (1) the power-law coupling index ranges from
nearly unity (linear correlation) for radio-loud Seyferts to significantly less
than unity for radio-quiet ones. This declining trend of coupling index also
holds from larger sources to compact ones; (2) the Seyferts with intermediate
to high accretion rate (Eddington ratio $\lambda\sim$ 0.001 to 0.3) show a
linear jet-disk coupling, but it shallows from near to super Eddington
($\lambda\sim$ 0.3 to 10), and the former is more radio loud than the latter;
(3) the Seyfert 1s are slightly steeper than the Seyfert 2s, in the jet-disk
correlation. In the linear coupling regime, the ratio of jet efficiency to
radiative efficiency ($\eta/\varepsilon$) is nearly invariant, but in low
accretion or super accretion regime, $\eta/\varepsilon$ varies with $\lambda$
in our model. We note that a radio-active cycle of accretion-dominated active
galactic nuclei would be: from a weaker jet-disk coupling in $\lambda<0.001$
for low luminosity Seyferts, to a linear coupling in $0.001<\lambda<0.3$ for
radio-loud luminous Seyferts and powerful radio galaxies/quasars, and to a
weaker coupling in $0.3<\lambda<10$ ones.
