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The nearby extreme ...
The nearby extreme accretion and feedback system PDS 456: finding a complex radio-emitting nucleus
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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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- Nardini, Emanuele (författare)
- Universita degli Studi di Firenze,University of Florence,Istituto nazionale di astrofisica (INAF)
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- Baan, Willem A. (författare)
- Netherlands Institute for Radio Astronomy (ASTRON)
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- Fan, Lulu (författare)
- University of Science and Technology of China,Shandong University
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- Mohan, Prashanth (författare)
- Chinese Academy of Sciences
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- Varenius, Eskil, 1986 (författare)
- University of Manchester,Chalmers tekniska högskola,Chalmers University of Technology
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- An, Tao (författare)
- Chinese Academy of Sciences
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(creator_code:org_t)
- 2020-08-17
- 2021
- Engelska.
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Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 500:2, s. 2620-2626
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https://academic.oup...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- When a black hole accretes close to the Eddington limit, the astrophysical jet is often accompanied by radiatively driven, wide-aperture and mildly relativistic winds. Powerful winds can produce significant non-thermal radio emission via shocks. Among the nearby critical accretion quasars, PDS 456 has a very massive black hole (about 1 billion solar masses), shows a significant star-forming activity (about 70 solar masses per year), and hosts exceptionally energetic X-ray winds (power up to 20 per cent of the Eddington luminosity). To probe the radio activity in this extreme accretion and feedback system, we performed very long baseline interferometric (VLBI) observations of PDS 456 at 1.66 GHz with the European VLBI Network and the enhanced Multi-Element Remotely Linked Interferometry Network. We find a rarely seen complex radio-emitting nucleus consisting of a collimated jet and an extended non-thermal radio emission region. The diffuse emission region has a size of about 360 pc and a radio luminosity about three times higher than that of the nearby extreme starburst galaxy Arp 220. The powerful nuclear radio activity could result either from a relic jet with a peculiar geometry (nearly along the line of sight) or more likely from diffuse shocks formed naturally by the existing high-speed winds impacting on high-density star-forming regions.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- galaxies: nuclei
- radio continuum: galaxies
- galaxies: active
- galaxies: jets
- quasars: individual: PDS 456
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Yang, Jun, 1979
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Paragi, Zsolt
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Nardini, Emanuel ...
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Baan, Willem A.
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Fan, Lulu
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Mohan, Prashanth
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visa fler...
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Varenius, Eskil, ...
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An, Tao
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visa färre...
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