GOALS-JWST: NIRCam and MIRI Imaging of the Circumnuclear Starburst Ring in NGC 7469

Abstract

We present James Webb Space Telescope (JWST) imaging of NGC 7469 with the Near-Infrared Camera (NIRCam) and the Mid-InfraRed Instrument (MIRI). NGC 7469 is a nearby, $z=0.01627$, luminous infrared galaxy (LIRG) that hosts both a Seyfert Type-1.5 nucleus and a circumnuclear starburst ring with a radius of $\sim$0.5 kpc. The new near-infrared (NIR) JWST imaging reveals 66 star-forming regions, 37 of which were not detected by HST observations. Twenty-eight of the 37 sources have very red NIR colors that indicate obscurations up to A${}_{\mathrm{v}}\sim 7$ and a contribution of at least 25$\%$ from hot dust emission to the 4.4$\mu$m band. Their NIR colors are also consistent with young ($<$5 Myr) stellar populations and more than half of them are coincident with the MIR emission peaks. These younger, dusty star-forming regions account for $\sim$6$\%$ and $\sim$17$\%$ of the total 1.5$\mu$m and 4.4$\mu$m luminosity of the starburst ring, respectively. Thanks to JWST, we find a significant number of young dusty sources that were previously unseen due to dust extinction. The newly identified 28 young sources are a significant increase compared to the number of HST-detected young sources (4-5). This makes the total percentage of the young population rise from $\sim$15$\%$ to 48$\%$. These results illustrate the effectiveness of JWST in identifying and characterizing previously hidden star formation in the densest star-forming environments around AGN.

arXiv comment4 figures, 1 table, Accepted by ApJL

References in corpus (36)

• On the variation of the Initial Mass Function
• Detailed Decomposition of Galaxy Images. II. Beyond Axisymmetric Models
• Star Clusters Across Cosmic Time
• GOALS: The Great Observatories All-Sky LIRG Survey
• The spectral evolution of the first galaxies. I. James Webb Space Telescope detection limits and color criteria for population III galaxies
• Outflows from AGN: Kinematics of the Narrow-Line and Coronal-Line Regions in Seyfert Galaxies
• Mid-Infrared Properties of Nearby Luminous Infrared Galaxies I: Spitzer IRS Spectra for the GOALS Sample
• Testing the Unification Model for AGN in the Infrared: are the obscuring tori of Type 1 and 2 Seyferts different?
• The Mid-Infrared Instrument for the James Webb Space Telescope, III: MIRIM, The MIRI Imager
• The Near-Infrared Broad Emission Line Region of Active Galactic Nuclei -- I. The Observations
• Mid-Infrared Atomic Fine-Structure Emission Line Spectra of Luminous Infrared Galaxies: Spitzer/IRS Spectra of the GOALS Sample
• The Nuclear Gas Dynamics and Star Formation of NGC 7469
• The Mid-Infrared Instrument for the James Webb Space Telescope, VII: The MIRI Detectors
• From molecules to Young Stellar Clusters: the star formation cycle across the M33 disk
• Reverberation Mapping of the Seyfert 1 Galaxy NGC 7469
• Radio structures of the nuclei of nearby Seyfert galaxies and the nature of the missing diffuse emission
• Radii of Young Star Clusters in Nearby Galaxies
• H$\alpha$ Morphologies of Star Clusters: A LEGUS study of HII region evolution timescales and stochasticity in low mass clusters
• Resolving the Stellar Populations in the Circumnuclear Ring of NGC 7469
• High Spatial Resolution Mid-infrared Observations of Three Seyfert Galaxies
• ALMA Observations of the Submillimeter Dense Molecular Gas Tracers in the Luminous Type-1 Active Nucleus of NGC 7469
• ALMA Observations of Multiple-CO and C Lines Toward the Active Galactic Nucleus of NGC 7469: X-Ray-dominated Region Caught in the Act
• GOALS-JWST: Resolving the Circumnuclear Gas Dynamics in NGC 7469 in the Mid-Infrared
• Reverberation Mapping Measurements of Black Hole Masses and Broad-Line Region Kinematics in Mrk 817 and NGC 7469
• Star-forming Clumps in Local Luminous Infrared Galaxies
• The AKARI 2.5-5 Micron Spectra of Luminous Infrared Galaxies in the Local Universe
• Looking for obscured young star clusters in NCG 1313
• Massive Star Cluster Formation and Destruction in Luminous Infrared Galaxies in GOALS
• Multi-wavelength campaign on NGC7469 I. The rich 640 ks RGS spectrum
• A Comparison between Nuclear Ring Star Formation in LIRGs and Normal Galaxies with the Very Large Array
• Is There a Fundamental Upper Limit to the Mass of a Star Cluster?
• A Very Large Array Survey of Luminous Extranuclear Star-forming Regions in Luminous Infrared Galaxies in GOALS
• MUSE reveals extended circumnuclear outflows in the Seyfert 1 NGC 7469
• Spatially Resolved Ionized Outflows Extending to $\sim$2 kpc in Seyfert 1 Galaxy NGC 7469 Revealed by VLT/MUSE
• The Mid-Infrared Instrument for the James Webb Space Telescope, X. Operations and Data Reduction
• Slitless spectroscopy with the James Webb Space Telescope Near-Infrared Camera (JWST NIRCam)

Cited by in corpus (6)

• The James Webb Space Telescope Mission
• GOALS-JWST: Gas Dynamics and Excitation in NGC7469 revealed by NIRSpec
• Clumpy star formation and an obscured nuclear starburst in the luminous dusty z=4 galaxy GN20 seen by MIRI/JWST
• PDRs4All VII. The 3.3 $\mu$m aromatic infrared band as a tracer of physical properties of the ISM in galaxies
• Core Revelations: the Star Formation and AGN Connection at the Heart of NGC 7469
• Investigating starburst-driven neutrino emission from galaxies in the Great Observatories All-Sky LIRG Survey