High-resolution radio imaging of the most distant radio quasar SDSS J0836+0054

Details High-resolution radio imaging of the most distant radio quasar SDSS J0836+0054 High-resolution radio imaging of the most distant radio quasar SDSS J0836+0054

2005-04-20

arxiv.org/abs/astro-ph/0504430v1

Astron.Astrophys. 436 (2005) L13-L16

Astronomy and Astrophysics

Astrophysics

4 pages, 4 figures, accepted as Letter for A&A

Scientific paper

10.1051/0004-6361:200500112

We observed SDSS J0836+0054, the most distant radio-loud quasar known at present (z=5.774) with the European Very Long Baseline Interferometry (VLBI) Network at the 5 GHz frequency on 2003 November 4. The source is compact at the milli-arcsecond (mas) angular scale with a flux density of 0.34 mJy. The observations with the Very Large Array (VLA) made on the consecutive day support a conclusion that the radio emission from SDSS J0836+0054 is essentially confined within the central 40 pc. Based on our phase-referenced VLBI observation, we obtained the astrometric position of the source accurate to ~2 mas.

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