Long-term variability of 3C 273 at 22 and 44 GHz

Journal Article · Mon Aug 01 04:00:00 EDT 1988 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/114824· OSTI ID:7089287

Botti, L C L; Abraham, Z

Observations of 3C 273 at 22 and 44 GHz during the past 7 yr are presented. Between 1981 and 1984, the QSO was in a high-flux-density state at both frequencies, the intensity decreasing by a factor of 2 during 1985, reaching a minimum value in April 1986. The changes in the flux density were larger at 44 GHz and preceded the changes at 22 GHz. The variability in 1983 was identified with the millimeter and infrared outburst of February 1983, and the observed flux-density fluctuations were correlated with the appearance of the superluminal knots observed at 10.7 GHz with VLBI techniques. 46 references.

• Research Organization: Instituto de Pesquisas Espaciais, Sao Jose dos Campos (Brazil)
• OSTI ID: 7089287
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 96; ISSN ANJOA
• 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
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
FLUX DENSITY
INTERFEROMETRY
MICROWAVE RADIATION
QUASARS
RADIANT FLUX DENSITY
RADIATIONS
SHOCK WAVES
VARIATIONS