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

K. E. Gabányi*, D. Cseh, S. Frey, Z. Paragi, L. I. Gurvits, T. An, Y. K. Zhang

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)L57-L60
JournalMonthly Notices of the Royal Astronomical Society: Letters
Issue number1
Publication statusPublished - 7 Apr 2015


  • Galaxies: active
  • Galaxies: high-redshift
  • Quasars: individual: SDSS J013127.34-032100.1
  • Techniques: interferometric


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