Optical variability of the quasar 3C 345

Journal Article · Fri Mar 01 04:00:00 EST 1985 · Astrophysics (Engl. Transl.); (United States)

OSTI ID:6163608

Babadzhanyants, M K; Belokon', E T

A composite light curve for the quasar 3C 345 is constructed for the complete time during which it has been observed optically (B band): 1965-1983. It is found that there has been a systematic increase in the mean luminosity of 3C 345 during the last 15 years at a rate of about 0. /sup m/ 05/yr. It is suggested that there is connection between the optical outbursts of 3C 345 with duration 1-2 yr and the appearance of compact radio components moving with superluminal velocities in its millisecond structure. Similar relationships can be traced in the N galaxy 3C 120. The appearance of a new radio component in the millisecond radio structure of 3C 345 associated with a ''slow'' outburst in 1982 is predicted. The occurrence in 1972-1975 of ''fast'' outbursts with duration of about 10 days agrees with a periodicity of 327 days, in agreement with the determination of a period (P = 321 days) for these outbursts obtained by Kinman et al. from a number of observations during 1965-1967.

• Research Organization: Leningrad State Univ., Leningrad
• OSTI ID: 6163608
• Journal Information: Astrophysics (Engl. Transl.); (United States), Journal Name: Astrophysics (Engl. Transl.); (United States) Vol. 20:5; ISSN ATPYA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANNUAL VARIATIONS
COSMIC RADIO SOURCES
DAILY VARIATIONS
ELECTROMAGNETIC RADIATION
GALAXIES
LUMINOSITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
QUASARS
RADIATIONS
RADIO GALAXIES
RADIOWAVE RADIATION
VARIATIONS
VELOCITY