Opacity in compact extragalactic radio sources and its effect on astrophysical and astrometric studies

2008/02/25 by Y. Y. Kovalev, A. P. Lobanov, A. B. Pushkarev +1 · 4 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Gamma-ray bursts and supernovae #Radio Astronomy Observations and Technology #astro-ph

paper · pdf · doi:10.1051/0004-6361:20078679

published as A&A 483 (2008), 759-768 · 11 pages, 8 figures, 2 tables, accepted for publication in the Astronomy and Astrophysics; minor corrections to the manuscript are made

openalex publication_date 2008/02/25 · arxiv created 2008/04/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31

Abstract

Context. The apparent position of the “core” in a parsec-scale radio jet (a compact, bright emitting region at the narrow end of the jet) depends on the observing frequency, owing to synchrotron self-absorption and external absorption. While providing a tool probing physical conditions in the vicinity of the core, this dependency poses problems for astrometric studies using compact radio sources.

Citations

• Spectral Evolution of the Parsec‐Scale Jet in the Quasar 3C 345
• Relativistic Beaming and the Intrinsic Properties of Extragalactic Radio Jets
• Sub‐Milliarcsecond Imaging of Quasars and Active Galactic Nuclei. III. Kinematics of Parsec‐scale Radio Jets
• The twin-jet system in NGC 1052: VLBI-scrutiny of the obscuring torus
• Aligning VLBI images of active galactic nuclei at different frequencies

Cited by

• Multifrequency method for mapping active galactic nuclei with allowance for the frequency-dependent image shift
• Catching the radio flare in CTA 102
• The influence of radio-extended structures on offsets between the optical and VLBI positions of sources in the ICRF2
• Intrinsic physical conditions and structure of relativistic jets in active galactic nuclei