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Constraining the ra...
Constraining the radio jet proper motion of the high-redshift quasar J2134− 0419 at z= 4.3
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- Perger, Krisztina (författare)
- Magyar Tudomanyos Akademia,Hungarian Academy of Sciences,Eötvös Loránd University (ELTE)
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- Frey, Sandor (författare)
- Magyar Tudomanyos Akademia,Hungarian Academy of Sciences
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- E. Gabanyi, Krisztina (författare)
- Magyar Tudomanyos Akademia,Hungarian Academy of Sciences,Eötvös Loránd University (ELTE)
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- An, Tao (författare)
- Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
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- Britzen, Silke (författare)
- Max-Planck Institut für Radioastronomie,Max-Planck Institute for Radio Astronomy
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- Cao, Hong-Min (författare)
- Shangqiu Normal University
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- Cseh, David (författare)
- Magyar Tudomanyos Akademia,Hungarian Academy of Sciences
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- Dennett-Thorpe, Jane (författare)
- University of Manchester
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- I. Gurvits, Leonid (författare)
- Technische Universiteit Delft,Delft University of Technology (TU Delft),Joint Institute for VLBI in Europe (JIVE)
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- Hong, Xiaoyu (författare)
- Shanghai Astronomical Observatory. Chinese Academy of Sciences,Shanghai Astronomical Observatory Chinese Academy of Sciences
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- M. Hook, Isobel (författare)
- Lancaster University
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- Paragi, Zsolt (författare)
- Joint Institute for VLBI in Europe (JIVE)
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- Schilizzi, Richard T. (författare)
- University of Manchester
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- Yang, Jun, 1979 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Zhang, Yingkang (författare)
- Chinese Academy of Sciences
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(creator_code:org_t)
- 2018-04-04
- 2018
- Engelska.
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Ingår i: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 477:1, s. 1065-1070
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- To date, PMN J2134–0419 (at a redshift z = 4.33) is the second most distant quasar known with a milliarcsecond-scale morphology permitting direct estimates of the jet proper motion. Based on two-epoch observations, we constrained its radio jet proper motion using the very long baseline interferometry (VLBI) technique. The observations were conducted with the European VLBI Network (EVN) at 5 GHz on 1999 November 26 and 2015 October 6. We imaged the central 10-pc scale radio jet emission and modelled its brightness distribution. By identifying a jet component at both epochs separated by 15.86 yr, a proper motion of μ = 0.035 ± 0.023 mas yr−1 is found. It corresponds to an apparent superluminal speed of βa = 4.1 ± 2.7 c. Relativistic beaming at both epochs suggests that the jet viewing angle with respect to the line of sight is smaller than 20°, with a minimum bulk Lorentz factor Γ = 4.3. The small value of the proper motion is in good agreement with the expectations from the cosmological interpretation of the redshift and the current cosmological model. Additionally we analysed archival Very Large Array observations of J2143−0419 and found indication of a bent jet extending to ∼30 kpc.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- galaxies: nuclei
- galaxies: high-redshift
- quasars: individual: PMN J2134−0419 – radio continuum: galaxies
- galaxies: active
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Till lärosätets databas
- Av författaren/redakt...
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Perger, Krisztin ...
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Frey, Sandor
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E. Gabanyi, Kris ...
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An, Tao
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Britzen, Silke
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Cao, Hong-Min
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visa fler...
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Cseh, David
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Dennett-Thorpe, ...
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I. Gurvits, Leon ...
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Hong, Xiaoyu
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M. Hook, Isobel
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Paragi, Zsolt
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Schilizzi, Richa ...
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Yang, Jun, 1979
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Zhang, Yingkang
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visa färre...
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