A parsec-scale faint jet in the nearby changing-look Seyfert galaxy Mrk 590

Abstract

Broad Balmer emission lines in active galactic nuclei (AGN) may display dramatic changes in amplitude, even disappearance and re-appearance in some sources. As a nearby galaxy at a redshift of z = 0.0264, Mrk 590 suffered such a cycle of Seyfert type changes between 2006 and 2017. Over the last fifty years, Mrk 590 also underwent a powerful continuum outburst and a slow fading from X-rays to radio wavelengths with a peak bolometric luminosity reaching about ten per cent of the Eddington luminosity. To track its past accretion and ejection activity, we performed very long baseline interferometry (VLBI) observations with the European VLBI Network (EVN) at 1.6 GHz in 2015. The EVN observations reveal a faint (~1.7 mJy) radio jet extending up to ~2.8 mas (projected scale ~1.4 pc) toward north, and probably resulting from the very intensive AGN activity. To date, such a parsec-scale jet is rarely seen in the known changing-look AGN. The finding of the faint jet provides further strong support for variable accretion as the origin of the type changes in Mrk 590.

5 pages, 1 figure, accepted for publication in MNRAS Letters

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Cited by in corpus (8)

• WISE view of changing-look AGNs: evidence for a transitional stage of AGNs
• Flares in the changing look AGN Mrk 590. I: The UV response to X-ray outbursts suggests a more complex reprocessing geometry than a standard disk
• A compact core-jet structure in the changing-look Seyfert NGC 2617
• The nascent milliquasar VT J154843.06+220812.6: tidal disruption event or extreme accretion-state change?
• The origin of the vanishing soft X-ray excess in the changing-look Active Galactic Nucleus Mrk 590
• NOEMA spatially resolved view of the multi-phase outflow in IRAS17020+4544: a shocked wind in action?
• Structural and spectral properties of Galactic plane variable radio sources
• A radio, optical, UV and X-ray view of the enigmatic changing look Active Galactic Nucleus 1ES~1927+654 from its pre- to post-flare states