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

2005/04/20 by S. Frey, Z. Paragi, L. Mosoni +2
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #astro-ph

paper · pdf · doi:10.1051/0004-6361:200500112

published as Astron.Astrophys. 436 (2005) L13-L16 · 4 pages, 4 figures, accepted as Letter for A&A

arxiv created 2005/04/20 · openalex publication_date 2005/05/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We observed SDSS J0836+0054, the most distant radio-loud quasar known at present () 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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