Black Hole Mass Estimation: How good is the virial estimate?
  Black hole mass is a key factor in determining how a black hole interacts
with its environment. However, the determination of black hole masses at high
redshifts depends on secondary mass estimators, which are based on empirical
relationships and broad approximations. A dynamical disk wind broad line region
(BLR) model of active galactic nuclei (AGN) is built in order to test the
impact on the black hole mass calculation due to different BLR geometries and
the inclination of the AGN. Monte Carlo simulations of two disk wind models are
constructed to recover the virial scale factor, $f$, at various inclination
angles. The resulting $f$ values strongly correlate with inclination angle,
with large $f$ values associated with small inclination angles (close to
face-on) and small $f$ values with large inclination angles (close to edge-on).
  The $f$ factors are consistent with previously determined $f$ values, found
from empirical relationships. Setting $f$ as a constant may introduce a bias
into virial black hole mass estimates for a large sample of AGN. However, the
extent of the bias depends on the line width characterisation (e.g. full width
at half maximum (FWHM) or line dispersion). Masses estimated using
$f_{\text{FWHM}}$ tend to biased towards larger masses, but this can be
corrected by calibrating for the width or shape of the emission line.
