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

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

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96..465b&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, Aug. 1988, p. 465-469. CNPq-FINEP-supported research.

Astronomy and Astrophysics

Astronomy

7

Microwave Emission, Quasars, Radio Astronomy, Variability, Radiant Flux Density, Relativistic Particles, Shock Waves, Very Long Base Interferometry

Scientific paper

The authors report observations of 3C 273 at 22 and 44 GHz during the past 7 yr. 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 authors identified the variability in 1983 with the millimeter and infrared outburst of February 1983, and were able to correlate the observed flux-density fluctuations with the appearance of the superluminal knots observed at 10.7 GHz with VLBI techniques.

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