학술논문
GOALS-JWST: Resolving the Circumnuclear Gas Dynamics in NGC 7469 in the Mid-infrared
Document Type
article
Author
Vivian, U; Lai, Thomas; Bianchin, Marina; Remigio, Raymond P; Armus, Lee; Larson, Kirsten L; Díaz-Santos, Tanio; Evans, Aaron; Stierwalt, Sabrina; Law, David R; Malkan, Matthew A; Linden, Sean; Song, Yiqing; van der Werf, Paul P; Gao, Tianmu; Privon, George C; Medling, Anne M; Barcos-Muñoz, Loreto; Hayward, Christopher C; Inami, Hanae; Rich, Jeff; Aalto, Susanne; Appleton, Philip; Bohn, Thomas; Böker, Torsten; Brown, Michael JI; Charmandaris, Vassilis; Finnerty, Luke; Howell, Justin; Iwasawa, Kazushi; Kemper, Francisca; Marshall, Jason; Mazzarella, Joseph M; McKinney, Jed; Muller-Sanchez, Francisco; Murphy, Eric J; Sanders, David; Surace, Jason
Source
The Astrophysical Journal Letters. 940(1)
Subject
Language
Abstract
The nearby, luminous infrared galaxy NGC 7469 hosts a Seyfert nucleus with a circumnuclear star-forming ring and is thus the ideal local laboratory for investigating the starburst-AGN (active galactic nucleus) connection in detail. We present integral-field observations of the central 1.3 kpc region in NGC 7469 obtained with the JWST Mid-InfraRed Instrument. Molecular and ionized gas distributions and kinematics at a resolution of ∼100 pc over the 4.9-7.6 μm region are examined to study the gas dynamics influenced by the central AGN. The low-ionization [Fe ii] λ5.34 μm and [Ar ii] λ6.99 μm lines are bright on the nucleus and in the starburst ring, as opposed to H2 S(5) λ6.91 μm, which is strongly peaked at the center and surrounding ISM. The high-ionization [Mg v] line is resolved and shows a broad, blueshifted component associated with the outflow. It has a nearly face-on geometry that is strongly peaked on the nucleus, where it reaches a maximum velocity of −650 km s−1, and extends about 400 pc to the east. Regions of enhanced velocity dispersion in H2 and [Fe ii] ∼ 180 pc from the AGN that also show high L(H2)/L(PAH) and L([Fe ii])/L(Pfα) ratios to the W and N of the nucleus pinpoint regions where the ionized outflow is depositing energy, via shocks, into the dense interstellar medium between the nucleus and the starburst ring. These resolved mid-infrared observations of the nuclear gas dynamics demonstrate the power of JWST and its high-sensitivity integral-field spectroscopic capability to resolve feedback processes around supermassive black holes in the dusty cores of nearby luminous infrared galaxies.