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Intermediate-mass b...
Intermediate-mass black holes: finding of episodic, large-scale, and powerful jet activity in a dwarf galaxy
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- Yang, Jun, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Paragi, Zsolt (författare)
- Joint Institute for VLBI in Europe (JIVE)
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- Frey, Sandor (författare)
- Magyar Tudomanyos Akademia,Hungarian Academy of Sciences,Eötvös Loránd University (ELTE)
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- Gurvits, (författare)
- Joint Institute for VLBI in Europe (JIVE),Technische Universiteit Delft,Delft University of Technology (TU Delft)
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- Liao, Mai (författare)
- University of Science and Technology of China
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- Liu, Xiang (författare)
- Chinese Academy of Sciences
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- Cui, Lang (författare)
- Chinese Academy of Sciences
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- Yang, Xiaolong (författare)
- Chinese Academy of Sciences
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- Chen, Wen, 1988 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Chinese Academy of Sciences
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- Varenius, Eskil, 1986 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Conway, John, 1963 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Chen, Rurong (författare)
- Chinese Academy of Sciences
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- Chang, Ning (författare)
- Chinese Academy of Sciences
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(creator_code:org_t)
- 2023-02-14
- 2023
- Engelska.
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Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 520:4, s. 5964-5973
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https://research.cha... (primary) (free)
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Dwarf galaxies are characterized by a very low luminosity and low mass. Because of significant accretion and ejection activity of massive black holes, some dwarf galaxies also host lo w-luminosity acti ve galactic nuclei (AGNs). In a few dwarf AGNs, very long baseline interferometry (VLBI) observations have found faint non-thermal radio emission. SDSS J090613.77 + 561015.2 is a dwarf AGN owning an intermediate-mass black hole (IMBH) with a mass of M-BH = 3 . 6 (+5.9) (-2.3 )x 10 (5) M(? )and showing a rarely seen two-component radio structure in its radio nucleus. To further probe their nature, i.e. the IMBH jet activity, we performed additional deep observations with the European VLBI Network (EVN) at 1.66 and 4.99 GHz. We find the more diffuse emission regions and structure details. These new EVN imaging results allow us to reveal a two-sided jet morphology with a size up to about 150 mas (projected length similar to 140 pc) and a radio luminosity of about 3 x 10( 38) erg s( -1). The peak feature has an optically thin radio spectrum and thus more likely represents a relatively young ejecta instead of a jet base. The EVN study on SDSS J090613.77 + 561015.2 demonstrates the existence of episodic, relatively large-scale, and powerful IMBH jet activity in dwarf AGNs. Moreo v er, we collected a small sample of VLBI-detected dwarf AGNs and investigated their connections with normal AGNs. We notice that these radio sources in the dwarf AGNs tend to have steep spectra and small linear sizes, and possibly represent ejecta from scaled-down episodic jet activity.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
- 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)
Nyckelord
- galaxies:individual:SDSS J090613.77+561015.2
- galaxies:active
- radio continuum:galaxies
- galaxies:dwarf
- individual
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Yang, Jun, 1979
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Paragi, Zsolt
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Frey, Sandor
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Gurvits,
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Liao, Mai
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Liu, Xiang
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visa fler...
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Cui, Lang
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Yang, Xiaolong
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Chen, Wen, 1988
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Varenius, Eskil, ...
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Conway, John, 19 ...
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Chen, Rurong
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Chang, Ning
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visa färre...
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