Multi-Sightline Observation of Narrow Absorption Lines in Lensed Quasar
  SDSS J1029+2623
  We exploit the widely-separated images of the lensed quasar SDSS J1029+2623
($z_{em}$=2.197, $\theta =22^{\prime\prime}\!\!.5$) to observe its outflowing
wind through two different sightlines. We present an analysis of three
observations, including two with the Subaru telescope in 2010 February (Misawa
et al. 2013) and 2014 April (Misawa et al. 2014), separated by 4 years, and one
with the Very Large Telescope, separated from the second Subaru observation by
$\sim$2 months. We detect 66 narrow absorption lines (NALs), of which 24 are
classified as intrinsic NALs that are physically associated with the quasar
based on partial coverage analysis. The velocities of intrinsic NALs appear to
cluster around values of $v_{ej}$ $\sim$ 59,000, 43,000, and 29,000 km/s, which
is reminiscent of filamentary structures obtained by numerical simulations.
There are no common intrinsic NALs at the same redshift along the two
sightlines, implying that the transverse size of the NAL absorbers should be
smaller than the sightline distance between two lensed images. In addition to
the NALs with large ejection velocities of $v_{ej}$ > 1,000 km/s, we also
detect broader proximity absorption lines (PALs) at $z_{abs}$ $\sim$ $z_{em}$.
The PALs are likely to arise in outflowing gas at a distance of r $\leq$ 620 pc
from the central black hole with an electron density of $n_e$ $\geq$
8.7$\times$10$^{3}$ cm$^{-3}$. These limits are based on the assumption that
the variability of the lines is due to recombination. We discuss the
implications of these results on the three-dimensional structure of the
outflow.
