Feeding versus feedback in AGN from near-infrared IFU observations XI: NGC 2110

Abstract

We present a two-dimensional mapping of the gas flux distributions, as well\nas of the gas and stellar kinematics in the inner 220 pc of the Seyfert galaxy\nNGC 2110, using K-band integral field spectroscopy obtained with the Gemini\nNIFS at a spatial resolution of ~24pc and spectral resolution of ~40 km/s. The\nH2 emission extends over the whole field-of-view and is attributed to heating\nby X-rays from the AGN and/or by shocks, while the Brgamma emission is\nrestricted to a bi-polar region extending along the South-East-North-West\ndirection. The masses of the warm molecular gas and of the ionized gas are\n~1.4x10^3 Msun and ~1.8x10^6 Msun, respectively. The stellar kinematics present\nvelocity dispersions reaching 250km/s and a rotation pattern reaching an\namplitude of 200 km/s. The gas velocity fields present a similar rotation\npattern but also additional components that we attribute to inflows and\noutflows most clearly observed in the molecular gas emission. The inflows are\nobserved beyond the inner 70 pc and are associated to a spiral arm seen in\nblueshift to the North-East and another in redshift to the South-West. We have\nestimated a mass inflow rate in warm molecular gas of ~4.6x10^-4 Msun/year.\nWithin the inner 70 pc, another kinematic component is observed in the H2\nemission that can be interpreted as due to a bipolar nuclear outflow oriented\nalong the East-West direction, with a mass-outflow rate of ~4.3x10^-4 Msun/year\nin warm H2.\n