Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-09-19
Publ.Astron.Soc.Jap. 58 (2006) 217-222
Astronomy and Astrophysics
Astrophysics
6 pages, 5 figures, accepted for the Publ. Astron. Soc. Japan, Vol. 57, No. 6, VSOP Special Issue (2005)
Scientific paper
In 1999, the highly compact and variable BL Lac object AO 0235+164 was identified as the highest brightness temperature active galactic nucleus observed with the VLBI Space Observatory Programme (VSOP), with T_B > 5.8 x 10^{13} K. The sub-milliarcsecond radio structure of this source has been studied with dual-frequency (1.6 and 5 GHz), polarization-sensitive VSOP observations during 2001 and 2002. Here we present the results of this monitoring campaign. At the time of these observations, the source was weakly polarized and characterized by a radio core that is clearly resolved on space-ground baselines.
Aller Hugh D.
Aller Margo F.
Altschuler Daniel R.
Davis Martin
Frey Sabine
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