NIR Imaging Spectroscopy of the Inner Few Arcseconds of NGC 4151 with OSIRIS at Keck

摘要: We present H- and K-band data from the inner arcsecond of Seyfert 1.5 galaxy NGC 4151 obtained with adaptive optics assisted near-infrared imaging field spectrograph OSIRIS at Keck Observatory. The angular resolution is about a few parsecs on-site thus competes easily optical images taken previously Hubble Space Telescope. morphology dynamics most species detected but focus on narrow line region (as traced by emission [FeII]1.644 m), interplay between plasma ejected nucleus 21 cm continuum radio data) hot H2 gas characterize nuclear HeI2.058 m absorption feature as (NAL) phenomenon. Emission (NLR) [FeII] reveals biconical we compare measured in models proposing acceleration NLR simple ejection into NLR. In 2.5 arcseconds model better fit to our than model.We also see evidence that jet very locally enhances certain positions field-of-view such were able distinct kinematics these clouds generally accelerated Further, aligned bicone surface rather axis assume not dominant mechanism responsible for driving thermal temperature 1700 K. observe remarkable correlation individual systemic velocity jet. propose least partially embedded galactic disk deviations linear structure are invoked interactions moving path because rotation 4151. Additionally, data, Br H2, velocities +/- 200 km/s several locations along appears blueshifted component an outflow. (absorption) has offset 10 (-280 km/s) Gaussian (Lorentzian) full-width (half-width) half maximum 160 (440 km/s). remains spatially unresolved its kinematic measures differ UV resonance lines. From amount derive lower limit HeI 2S column density 1 10(exp 14) cm2 covering factor line-of-sight C(sub los) approximately equal 0.1.