Multifrequency radio observations of the variable quasars 0133 + 476, 0235 + 164, 1749 + 096, and 2131 - 021

Details Multifrequency radio observations of the variable quasars 0133 + 476, 0235 + 164, 1749 + 096, and 2131 - 021 Multifrequency radio observations of the variable quasars 0133 + 476, 0235 + 164, 1749 + 096, and 2131 - 021

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986aj.....92.1262o&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 92, Dec. 1986, p. 1262-1271. Research supported by Williams College and Colgate Univ

Astronomy and Astrophysics

Astronomy

13

Astronomical Spectroscopy, Periodic Variations, Quasars, Radio Frequencies, Radio Sources (Astronomy), Astronomical Models, Polarization Characteristics, Radiant Flux Density

Scientific paper

Observations of the long-term variability of four BL Lacertae type quasars, 0133+476, 0235+164, 1749+096, and 2131-021, at 2.7, 7.9, 15.5, 31.4, and 89.6 GHz are presented. These quasars exhibit large variations in both total flux density and polarization on time scales of less than 3 months and are the four most variable objects in linear polarization at 2.7 GHz in the authors' monitoring program of ≡100 sources. The variations in polarized flux density and position angle in these objects are not clearly correlated with those of the total flux density. Simple one- and two-component models for polarization variability are discussed and rejected, and multiple-component models may be required to explain the complexity of the variations.

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