The connection between the activity of the quasar 3C 345 in the optical and radio ranges

Journal Article · Sun Sep 01 04:00:00 EDT 1985 · Astrophysics (Engl. Transl.); (United States)

DOI:https://doi.org/10.1007/BF01005735· OSTI ID:5717141

Babadzhanyants, M K; Belokon', E T; Gorokhov, V L

For the quasar 3C 345, a cross-correlation analysis is carried out of the data on optical and radio variability over long (of the order of hundreds of days) time scales. A high degree of correlation is found between the radio outbursts and the ''slow'' component (the characteristic time of variation being around 1 yr) in the optical brightness variations, the radio outbursts lagging behind by 7001000 days. A comparison of the magnitude of the lag with the apparent ''superluminal'' velocity of the radio components of the millisecond structure of 3C 345 enables to estimate the distance form the nucleus of the region in which the radio emission arises (/tau/ about 0''.7 x 10/sup -3/).

• Research Organization: Leningrad State University, Leningrad
• OSTI ID: 5717141
• Journal Information: Astrophysics (Engl. Transl.); (United States), Journal Name: Astrophysics (Engl. Transl.); (United States) Vol. 21:2; ISSN ATPYA
• 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
BRIGHTNESS
CORRELATION FUNCTIONS
COSMIC RADIO SOURCES
COSMIC RAY FLUX
COSMIC RAY PROPAGATION
ELECTROMAGNETIC RADIATION
FLUX DENSITY
FUNCTIONS
MATHEMATICS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PLASMA
QUASARS
RADIATION FLUX
RADIATION TRANSPORT
RADIATIONS
RADIOWAVE RADIATION
REGRESSION ANALYSIS
RELATIVISTIC PLASMA
STATISTICS
VARIATIONS
VELOCITY
VISIBLE RADIATION