High Resolution X-ray Spectroscopy of the Seyfert 1, Mrk 1040. Revealing
  the Failed Nuclear Wind with Chandra
  High resolution X-ray spectroscopy of the warm absorber in the nearby X-ray
bright Seyfert 1 galaxy, Mrk 1040 is presented. The observations were carried
out in the 2013-2014 timeframe using the Chandra High Energy Transmission
Grating with a total exposure of 200 ks. A multitude of absorption lines from
Ne, Mg and Si are detected from a wide variety of ionization states. In
particular, the detection of inner K-shell absorption lines from Ne, Mg and Si,
from charge states ranging from F-like to Li-like ions, suggests the presence
of a substantial amount of low ionization absorbing gas, illuminated by a steep
soft X-ray continuum. The observations reveal at least 3 warm absorbing
components ranging in ionization parameter from $\log\xi = 0-2$ and with column
densities of $N_{\rm H} =1.5-4.0 \times 10^{21}$cm$^{-2}$. The velocity
profiles imply that the outflow velocities of the absorbing gas are low and
within $\pm100$ km s$^{-1}$ of the systemic velocity of Mrk 1040, which
suggests any outflowing gas may have stalled in this AGN on large enough
scales. The warm absorber is likely located far from the black hole, within 300
pc of the nucleus and is spatially coincident with emission from an extended
Narrow Line Region as seen in the HST images. The iron K band spectrum reveals
only narrow emission lines, with Fe K$\alpha$ at 6.4 keV consistent with
originating from reflection off Compton thick pc-scale reprocessing gas.
