Active Galactic Nuclei with Ultra-fast Outflows Monitoring Project: The
  Broad-line Region of Mrk 79 as a Disk Wind
  We developed a spectroscopic monitoring project to investigate the kinematics
of the broad-line region (BLR) in active galactic nuclei (AGN) with ultra-fast
outflows (UFOs). Mrk~79 is a radio-quiet AGN with UFOs and warm absorbers, had
been monitored by three reverberation mapping (RM) campaigns, but its BLR
kinematics is not understood yet. In this paper, we report the results from a
new RM-campaign of Mrk~79, which was undertaken by Lijiang 2.4-m telescope.
Mrk~79 is seeming to come out the faint state, the mean flux approximates a
magnitude fainter than historical record. We successfully measured the lags of
the broad emission lines including H$\beta~\lambda4861$, H$\gamma~\lambda4340$,
He II $\lambda4686$ and He I $\lambda5876$ with respect to the varying AGN
continuum. Based on the broad H$\beta~\lambda4861$ line, we measured black hole
(BH) mass of $M_{\bullet}=5.13^{+1.57}_{-1.55}\times10^{7}M_{\odot}$, estimated
accretion rates of ${\dot{M}_{\bullet}}=(0.05\pm0.02)~L_{\rm Edd}~c^{-2}$,
indicating that Mrk~79 is a sub-Eddington accretor. We found that Mrk~79
deviates from the canonical Radius$-$Luminosity relationship. The marginal
blueshift of the broad He II $\lambda4686$ line detected from rms spectrum
indicates outflow of high-ionization gas. The velocity-resolved lag profiles of
the broad H$\gamma~\lambda4340$, H$\beta~\lambda4861$, and He I $\lambda5876$
lines show similar signatures that the largest lag occurs in the red wing of
the lines then the lag decreases to both sides. These signatures should suggest
that the BLR of Keplerian motion probably exists the outflow gas motion. All
findings including UFOs, warm absorbers, and the kinematics of high- and
low-ionization BLR, may provide an indirect evidence that the BLR of Mrk~79
probably originates from disk wind.
