Outflows, inflows, and young stars in the inner 200 pc of the Seyfert galaxy NGC 2110
Abstract
We present a 2D mapping of stellar population age components, emission-line fluxes, gas excitation, and kinematics within the inner ∼200 pc of the Seyfert 2 galaxy NGC 2110. We used the Gemini North Integral Field Spectrograph (NIFS) in the J and K bands at a spatial resolution of ∼22 pc. The unresolved nuclear continuum is originated in combined contributions of young stellar population (SP; age ≤ 100 Myr), a featureless AGN continuum and hot dust emission. The young-intermediate SP (100 < age ≤ 700 Myr) is distributed in a ring-shaped structure at ≈140 pc from the nucleus, which is roughly coincident with the lowest values of the stellar velocity dispersion. In the inner ≈115 pc the old SP (age > 2 Gyr) is dominant. The [Fe II] λ 1.2570 μm emission-line flux distribution is correlated with the radio emission and its kinematics comprise two components, one from gas rotating in the galaxy plane and another from gas in outflow within a bicone-oriented along north-south. These outflows seem to originate in the interaction of the radio jet with the ambient gas producing shocks that are the main excitation mechanism of the [Fe II] emission. We estimate: (1) an ionized gas mass outflow rate of ∼0.5 M⊙ yr-1 at ∼70 pc from the nucleus; and (2) a kinetic power for the outflow of only 0.05 per cent of the AGN bolometric luminosity implying weak feedback effect on the galaxy.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- August 2019
- DOI:
- 10.1093/mnras/stz1329
- arXiv:
- arXiv:1905.04168
- Bibcode:
- 2019MNRAS.487.3958D
- Keywords:
-
- galaxies: individual (NGC 2110);
- galaxies: kinematics and dynamics;
- galaxies: Seyfert;
- infrared: galaxies;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- Accepted for publication in MNRAS