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A compact core-jet ...
A compact core-jet structure in the changing-look Seyfert NGC 2617
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- Yang, Jun, 1979 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Joint Institute for VLBI in Europe (JIVE)
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- Paragi, Zsolt (author)
- Joint Institute for VLBI in Europe (JIVE)
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- Beswick, Robert J. (author)
- University of Manchester
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- Chen, Wen, 1988 (author)
- Chinese Academy of Sciences
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- van Bemmel, Ilse M. (author)
- Joint Institute for VLBI in Europe (JIVE)
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- Wu, Qingwen (author)
- Huazhong University of Science and Technology
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- An, Tao (author)
- Chinese Academy of Sciences
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- Wu, Xiaocong (author)
- Chinese Academy of Sciences
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- Fan, Lulu (author)
- Shandong University,University of Science and Technology of China
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- Oonk, J. B. R. (author)
- Universiteit Leiden (UL),Leiden University (UL),Netherlands Institute for Radio Astronomy (ASTRON),Surfsara Bv
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- Liu, Xiang (author)
- Chinese Academy of Sciences
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- Wang, Weihua (author)
- Changzhou Institute of Technology
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(creator_code:org_t)
- 2021-03-10
- 2021
- English.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 503:3, s. 3886-3895
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Abstract
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- The nearby face-on spiral galaxy NGC 2617 underwent an unambiguous 'inside-out' multiwavelength outburst in Spring 2013, and a dramatic Seyfert-type change probably between 2010 and 2012, with the emergence of broad optical emission lines. To search for the jet activity associated with this variable accretion activity, we carried out multiresolution and multiwavelength radio observations. Using the very long baseline interferometric (VLBI) observations with the European VLBI Network at 1.7 and 5.0 GHz, we find that NGC 2617 shows a partially synchrotron self-absorbed compact radio core with a significant core shift, and an optically thin steep-spectrum jet extending towards the north up to about 2 pc in projection. We also observed NGC 2617 with the electronic Multi-Element Remotely Linked Interferometer Network at 1.5 and 5.5 GHz, and revisited the archival data of the Very Large Array (VLA) and the Very Long Baseline Array (VLBA). The radio core had a stable flux density of similar to 1.4 mJy at 5.0 GHz between 2013 June and 2014 January, in agreement with the expectation of a supermassive black hole in the low accretion rate state. The northern jet component is unlikely to be associated with the 'inside-out' outburst of 2013. Moreover, we report that most optically selected changing-look active galactic nuclei (AGN) at z < 0.83 are sub-mJy radio sources in the existing VLA surveys at 1.4 GHz, and it is unlikely that they are more active than normal AGN at radio frequencies.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
Keyword
- radio continuum: galaxies
- galaxies: Seyfert
- galaxies: individual: NGC 2617
- galaxies: active
- galaxies: jets
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Yang, Jun, 1979
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Paragi, Zsolt
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Beswick, Robert ...
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Chen, Wen, 1988
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van Bemmel, Ilse ...
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Wu, Qingwen
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show more...
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An, Tao
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Wu, Xiaocong
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Fan, Lulu
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Oonk, J. B. R.
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Liu, Xiang
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Wang, Weihua
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Climate Research
- Articles in the publication
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Monthly Notices ...
- By the university
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Chalmers University of Technology