The Astrophysical Journal Letters (Jan 2022)

GOALS-JWST: Resolving the Circumnuclear Gas Dynamics in NGC 7469 in the Mid-infrared

  • Vivian U,
  • Thomas Lai,
  • Marina Bianchin,
  • Raymond P. Remigio,
  • Lee Armus,
  • Kirsten L. Larson,
  • Tanio Díaz-Santos,
  • Aaron Evans,
  • Sabrina Stierwalt,
  • David R. Law,
  • Matthew A. Malkan,
  • Sean Linden,
  • Yiqing Song,
  • Paul P. van der Werf,
  • Tianmu Gao,
  • George C. Privon,
  • Anne M. Medling,
  • Loreto Barcos-Muñoz,
  • Christopher C. Hayward,
  • Hanae Inami,
  • Jeff Rich,
  • Susanne Aalto,
  • Philip Appleton,
  • Thomas Bohn,
  • Torsten Böker,
  • Michael J. I. Brown,
  • Vassilis Charmandaris,
  • Luke Finnerty,
  • Justin Howell,
  • Kazushi Iwasawa,
  • Francisca Kemper,
  • Jason Marshall,
  • Joseph M. Mazzarella,
  • Jed McKinney,
  • Francisco Muller-Sanchez,
  • Eric J. Murphy,
  • David Sanders,
  • Jason Surace

DOI
https://doi.org/10.3847/2041-8213/ac961c
Journal volume & issue
Vol. 940, no. 1
p. L5

Abstract

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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 μ m region are examined to study the gas dynamics influenced by the central AGN. The low-ionization [Fe ii ] λ 5.34 μ m and [Ar ii ] λ 6.99 μ m lines are bright on the nucleus and in the starburst ring, as opposed to H _2 S(5) λ 6.91 μ m, 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 H _2 and [Fe ii ] ∼ 180 pc from the AGN that also show high L (H _2 )/ L (PAH) and L ([Fe ii ])/ L (Pf α ) 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.