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

Gabányi, Krisztina Éva and Cseh, D. and Frey, Sándor and Paragi, Z. and Gurvits, L. I. (2015) VLBI observation of the newly discovered z=5.18 quasar SDSS J0131-0321. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY: LETTERS, 450 (1). L57-L60. ISSN 1745-3925

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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 inter- ferometry (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 tem- perature 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.

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