Constraining the radio jet proper motion of the high-redshift quasar J2134-0419 at z = 4.3

Perger, Krisztina and Frey, Sándor and Gabányi, Krisztina É. and An, Tao and Britzen, Silke and Cao, Hong-Min and Cseh, Dávid and Dennett-Thorpe, Jane and Gurvits, Leonid I. and Hong, Xiao-Yu and Hook, Isobel M. and Paragi, Zsolt and Schilizzi, Richard T. and Yang, Jun and Zhang, Yingkang (2018) Constraining the radio jet proper motion of the high-redshift quasar J2134-0419 at z = 4.3. Monthly Notices of the Royal Astronomical Society, 477 (1). pp. 1065-1070. ISSN 0035-8711

[img]
Preview
PDF (perger_final_published)
perger_final_published.pdf - Accepted Version
Available under License Creative Commons Attribution-NonCommercial.

Download (1MB)

Abstract

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 modeled 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 analyzed archival Very Large Array observations of J2143-0419 and found indication of a bent jet extending to ˜30 kpc.

Item Type:
Journal Article
Journal or Publication Title:
Monthly Notices of the Royal Astronomical Society
Additional Information:
This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated versionKrisztina Perger, Sándor Frey, Krisztina É Gabányi, Tao An, Silke Britzen, Hong-Min Cao, Dávid Cseh, Jane Dennett-Thorpe, Leonid I Gurvits, Xiao-Yu Hong, Isobel M Hook, Zsolt Paragi, Richard T Schilizzi, Jun Yang, Yingkang Zhang; Constraining the radio jet proper motion of the high-redshift quasar J2134−0419 at z = 4.3, Monthly Notices of the Royal Astronomical Society, Volume 477, Issue 1, 11 June 2018, Pages 1065–1070, https://doi.org/10.1093/mnras/sty837 is available online at: https://academic.oup.com/mnras/article/477/1/1065/4961150
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900/1912
Subjects:
ID Code:
124766
Deposited By:
Deposited On:
25 Apr 2018 14:22
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Sep 2020 03:54