Radio variability of the blazar AO 0235 + 164

Journal Article · Tue Mar 01 04:00:00 EST 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/166126· OSTI ID:7222599

O'dell, S L; Dennison, B; Broderick, J J; Altschuler, D R; Condon, J J; Payne, H E; Mitchell, K J

The high-redshift blazar A0 0235 + 164 exhibits flux-density variations which are primarily of the less common variety in which low-frequency flux-density variations track the high-frequency variations but are delayed and of smaller amplitude. Observational results based on five years of monitoring are presented which are correlated over at least a factor of 50 frequency range in the sense expected for an expanding synchrotron component: outbursts propagating toward lower frequencies with diminishing amplitudes. A simple, semiempirical jet model is developed which accounts reasonably well for the radio properties of the object. The predictions of the model are compared with observations, examining the radio flux-density histories, the radio spectral evolution, the radio structure, and evidence for relativistic bulk motion. 59 references.

• Research Organization: Virginia Polytechnic Institute and State Univ., Blacksburg (USA); Puerto Rico Universidad, Rio Piedras; National Radio Astronomy Observatory, Charlottesville, VA (USA); NASA, Goddard Space Flight Center, Greenbelt, MD (USA)
• OSTI ID: 7222599
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 326; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BL LACERTAE OBJECTS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ENERGY RANGE
FLUX DENSITY
MATHEMATICAL MODELS
MORPHOLOGY
PLASMA JETS
RADIANT FLUX DENSITY
RADIATIONS
RADIOWAVE RADIATION
RELATIVISTIC RANGE
VARIATIONS