VSOP Monitoring of the Compact BL Lac Object AO 0235+164

2005/09/19 by S. Frey, L. I. Gurvits, Leonid Gurvits +10
Engineering · Physics and Astronomy · #Active galactic nucleus #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #BL Lac object #Blazar #Brightness #Brightness temperature #Galaxy #Gamma ray #Particle accelerators and beam dynamics #Physics #Polarization (electrochemistry) #Radio Astronomy Observations and Technology #Very-long-baseline interferometry #astro-ph

paper · pdf · doi:10.1093/pasj/58.2.217

published as Publ.Astron.Soc.Jap. 58 (2006) 217-222 · 6 pages, 5 figures, accepted for the Publ. Astron. Soc. Japan, Vol. 57, No. 6, VSOP Special Issue (2005)

arxiv created 2005/09/19 · openalex publication_date 2006/04/25 · arxiv updated 2015/06/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Abstract 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 \gt 5.8 ×10¹³ K T_B \gt 5.8 ×10¹³ K (Frey et al. 2000). The sub-milliarcsec 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.

Citations

• Dual-Frequency VSOP Observations of AO 0235+164
• Centimeter‐Wavelength Total Flux and Linear Polarization Properties of Radio‐loud BL Lacertae Objects
• Sub-Milliarcsecond Imaging of Quasars and Active Galactic Nuclei. IV. Fine-Scale Structure
• Helical jets in blazars