New evidence for a 13-year period in the optical variability of the quasar 3C 273 and its correlation with observed parameters of a parsec-scale radio jet

Details New evidence for a 13-year period in the optical variability of the quasar 3C 273 and its correlation with observed parameters of a parsec-scale radio jet New evidence for a 13-year period in the optical variability of the quasar 3C 273 and its correlation with observed parameters of a parsec-scale radio jet

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993azh....70..241b&link_type=abstract

Astronomicheskij Zhurnal (ISSN 0004-6299), vol. 70, no. 2, p. 241-257.

Astronomy and Astrophysics

Astronomy

10

Light Curve, Quasars, Radio Jets (Astronomy), Spectral Correlation, Visual Observation, Annual Variations, Periodic Variations, Power Spectra, Spectrum Analysis

Scientific paper

The optical (B band) light curve of the quasar 3C 273 for the time interval 1887-1991 is presented. Power spectra for the total time interval and its segments suggest a possible 13.4-yr period in light variations of 3C 273 during the entire observational time interval, including the past few decades. A characteristic feature of the variability is significant dips in brightness lasting 1-2 yr. Some features of the optical light curve, in particular, its symmetry relative to the mean brightness level and its correlation with the parameters of the milliarcsecond radio jet, can be explained in terms of the relativistic jet aligned close to the line of sight.

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