A CO molecular gas wind 340 pc away from the Seyfert 2 nucleus in ESO 420-G13 probes an elusive radio jet

Abstract

A prominent jet-driven outflow of CO(2-1) molecular gas is found along the kinematic minor axis of the Seyfert 2 galaxy ESO 420-G13, at a distance of $340-600\mathrm{pc}$ from the nucleus. The wind morphology resembles a characteristic funnel shape, formed by a highly collimated filamentary emission at the base, likely tracing the jet propagation through a tenuous medium, until a bifurcation point at $440\mathrm{pc}$ where the jet hits a dense molecular core and shatters, dispersing the molecular gas into several clumps and filaments within the expansion cone. We also trace the jet in ionised gas within the inner $\lesssim 340\mathrm{pc}$ using the [NeII]${}_{12.8\mu \mathrm{m}}$ line emission, where the molecular gas follows a circular rotation pattern. The wind outflow carries a mass of $\sim 8\times 10^6{\mathrm{M}}_{\odot }$ at an average wind projected speed of $\sim 160\mathrm{km}{\mathrm{s}}^{-1}$, which implies a mass outflow rate of $\sim 14{\mathrm{M}}_{\odot }\mathrm{y}{\mathrm{r}}^{-1}$. Based on the structure of the outflow and the budget of energy and momentum, we discard radiation pressure from the active nucleus, star formation, and supernovae as possible launching mechanisms. ESO 420-G13 is the second case after NGC 1377 where the presence of a previously unknown jet is revealed due to its interaction with the interstellar medium, suggesting that unknown jets in feeble radio nuclei might be more common than expected. Two possible jet-cloud configurations are discussed to explain the presence of an outflow at such distance from the AGN. The outflowing gas will likely not escape, thus a delay in the star formation rather than quenching is expected from this interaction, while the feedback effect would be confined within the central few hundred parsecs of the galaxy.

12 pages, 8 figures. Accepted for publication in A&A

References in corpus (14)

• The Co-Evolution of Galaxies and Supermassive Black Holes: Insights from Surveys of the Contemporary Universe
• HyperLEDA. III. The catalogue of extragalactic distances
• Molecular line emission in NGC1068 imaged with ALMA. I An AGN-driven outflow in the dense molecular gas
• The Current Status of Galaxy Formation
• The impact of mechanical AGN feedback on the formation of massive early-type galaxies
• The origin of fast molecular outflows in quasars: molecule formation in AGN-driven galactic winds
• CASSIS: The Cornell Atlas of Spitzer/Infrared Spectrograph Sources. II. High-resolution observations
• Mid-Infrared Properties of Luminous Infrared Galaxies II: Probing the Dust and Gas Physics of the GOALS Sample
• Far-infrared line spectra of active galaxies from the Herschel/PACS Spectrometer: the complete database
• ALMA reveals optically thin, highly excited CO gas in the jet-driven winds of the galaxy IC5063
• Star Formation Rates from [CII] 158 um and Mid Infrared Emission Lines for Starbursts and AGN
• WFPC2 LRF Imaging of Emission Line Nebulae in 3CR Radio Galaxies
• Probing the Physics of Narrow Line Regions in Active Galaxies IV: Full data release of The Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7)
• An accreting supermassive black hole irradiating molecular gas in NGC 2110

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• The IBISCO survey: I. Multiphase discs and winds in the Seyfert galaxy Markarian 509
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