VLBI observation of the newly discovered z = 5.18 quasar SDSS J0131-0321

Journal article (2015)

Authors

K. Gabányi Konkoly Observatory Hungarian Academy of Sciences
Dávid Cseh Radboud Universiteit Nijmegen
Sándor Frey FöMI Satellite Geodetic Observatory
Z. Paragi Joint Institute for VLBI ERIC
L. Gurvits Joint Institute for VLBI ERIC, Astrodynamics & Space Missions - Aerospace Engineering
T. An Chinese Academy of Sciences
Y. K. Zhang Key Laboratory of Radio Astronomy, Chinese Academy of Sciences
Research Group
Astrodynamics & Space Missions (Aerospace Engineering) (TU Delft)
Techniques: interferometric Galaxies: high-redshift Galaxies: active Quasars: individual: SDSS J013127.34-032100.1
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Published Date

07-04-2015

Language

English

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Faculty

Aerospace Engineering

Department

Space Engineering

Research Group

Astrodynamics & Space Missions

Abstract

Few high-redshift, radio-loud quasars are known to date. The extremely luminous, radio-bright quasar, SDSS J013127.34-032100.1 was recently discovered at a redshift of z = 5.18. We observed the source with high resolution very long baseline interferometry (VLBI) at 1.7 GHz with the European VLBI Network (EVN) and found a single compact radio component. We estimated a lower limit to the brightness temperature of the detected radio component, TB ~1011 K. Additionaly, when compared to archival radio data, the source showed significant flux density variation. These two findings are indicative of the blazar nature of the source.