A parsec-scale faint jet in the nearby changing-look Seyfert galaxy Mrk 590
Journal article, 2021

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 50 yr, 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 10 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.

galaxies: individual: Mrk 590

galaxies: jets

radio continuum: galaxies

galaxies: Seyfert

galaxies: active


Jun Yang

Chalmers, Space, Earth and Environment, Onsala Space Observatory, Observation Support

I. van Bemmel

Joint Institute for VLBI in Europe (JIVE)

Z. Paragi

Joint Institute for VLBI in Europe (JIVE)

S. Komossa

Max Planck Society

Feng Yuan

Shanghai Astronomical Observatory

Xiaolong Yang

Shanghai Astronomical Observatory

Tao An

Shanghai Astronomical Observatory

Jun Yi Koay

Academia Sinica

C. Reynolds

CSIRO Astronomy and Space Science

J. B. R. Oonk

Leiden University

SURFsara, Netherlands

Netherlands Institute for Radio Astronomy (ASTRON)

Xiang Liu

Chinese Academy of Sciences

Qingwen Wu

Huazhong University of Science and Technology

Monthly Notices of the Royal Astronomical Society: Letters

17453925 (ISSN) 17453933 (eISSN)

Vol. 502 1 L61-L65

Subject Categories

Astronomy, Astrophysics and Cosmology


Climate Research



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7/8/2021 8