Double-Peaked Emission Lines due to A Radio Outflow in KISSR1219
  We present the results from 1.5 and 5 GHz phase-referenced VLBA and 1.5 GHz
Karl G. Jansky Very Large Array (VLA) observations of the Seyfert 2 galaxy
KISSR1219, which exhibits double peaked emission lines in its optical spectrum.
The VLA and VLBA data reveal a one-sided core-jet structure at roughly the same
position angles, providing evidence of an AGN outflow. The absence of dual
parsec-scale radio cores puts the binary black hole picture in doubt for the
case of KISSR1219. The high brightness temperatures of the parsec-scale core
and jet components ($>10^6$ K) are consistent with this interpretation. Doppler
boosting with jet speeds of $\gtrsim0.55c$ to $\gtrsim0.25c$, going from
parsec- to kpc-scales, at a jet inclination $\gtrsim50^\circ$ can explain the
jet one-sidedness in this Seyfert 2 galaxy. A blue-shifted broad emission line
component in [O {\sc iii}] is also indicative of an outflow in the emission
line gas at a velocity of $\sim350$ km s$^{-1}$, while the [O {\sc i}] doublet
lines suggest the presence of shock-heated gas. A detailed line ratio study
using the MAPPINGS III code further suggests that a shock+precursor model can
explain the line ionization data well. Overall, our data suggest that the radio
outflow in KISSR1219 is pushing the emission line clouds, both ahead of the jet
and in a lateral direction, giving rise to the double peak emission line
spectra.
