Resolving the coronal line region of NGC 1068 with near-infrared integral field spectroscopy

摘要: We present adaptive optics-assisted J- and K-band integral field spectroscopy of the inner 300× 300 pc Seyfert 2 galaxy NGC 1068. The data were obtained with Gemini NIFS unit spectrometer, which provided us wit h high-spatial high-spectral resolution sampling. wavelength range covered by observations allowed to study [Caviii], [Sivi], [Sivii], [Alix] [Six] coronal line (CL) emission, covering ionization potentials up 328 eV. reveal very rich complex structures, both in terms velocity fields emission-line ratios. CL emi ssion is elongated along NESW direction, stronger emission preferentially lo calized NE nucleus. CLs are emitted gas a wide velocities, maximum blueshifts/redshifts ∼ −1600/1000 km s −1 . There trend for located on side nucleus be blueshifted while towards SW redshifted. morphology kinematics near-infrared good agreement ones displayed low-ionization lines optical CLs, suggesting common origin. flux distributions, maps, structure (traced [Sivii]/[Sivi] ratio) lowionization ratios (i.e. [Feii]/Paβ [Feii]/[Pii]) suggest that radio jet plays an important role region this object, possibly its kinematics.