A parsec-scale faint jet in the nearby changing-look Seyfert galaxy Mrk 590
Autor: | Zsolt Paragi, J. B. R. Oonk, Xiang Liu, Ilse van Bemmel, Xiaolong Yang, Jun Yang, Jun Yi Koay, Tao An, S. Komossa, C. S. Reynolds, Qingwen Wu, Feng Yuan |
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Rok vydání: | 2021 |
Předmět: |
Galaxies: Seyfert
European VLBI Network Active galactic nucleus Astrophysics - astrophysics of galaxies FOS: Physical sciences Astrophysics Astrophysics - high energy astrophysical phenomena 01 natural sciences Radio continuum: galaxies Luminosity symbols.namesake 0103 physical sciences Very-long-baseline interferometry 010303 astronomy & astrophysics High Energy Astrophysical Phenomena (astro-ph.HE) Physics 010308 nuclear & particles physics Balmer series Astronomy and Astrophysics Galaxies: active Galaxy Redshift Galaxies: individual: Mrk 590 Galaxies: jets Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Eddington luminosity symbols |
Zdroj: | Monthly Notices of the Royal Astronomical Society, 502(1), L61-L65 |
ISSN: | 1745-3933 1745-3925 |
Popis: | 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 |
Databáze: | OpenAIRE |
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