The radio fine structure of the BL Lacertae objects AO 0235 + 164, 0735 + 178, BL Lac, 1749 + 701, MK 421, and 3C 66 A at 5 GHZ

Details The radio fine structure of the BL Lacertae objects AO 0235 + 164, 0735 + 178, BL Lac, 1749 + 701, MK 421, and 3C 66 A at 5 GHZ The radio fine structure of the BL Lacertae objects AO 0235 + 164, 0735 + 178, BL Lac, 1749 + 701, MK 421, and 3C 66 A at 5 GHZ

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....96..316b&link_type=abstract

Astronomy and Astrophysics, vol. 96, no. 1-2, Mar. 1981, p. 316-324. Research supported by the Statens Naturvetenskapliga Forsk

Astronomy and Astrophysics

Astronomy

43

Bl Lacertae Objects, Fine Structure, Radio Sources (Astronomy), Very Long Base Interferometry, Astronomical Maps, Circular Polarization, Data Reduction, Emission Spectra, Signal To Noise Ratios

Scientific paper

Very long baseline interferometer observations at 4997 MHz (λ = 6 cm) on European and intercontinental baselines with lengths up to 1.35 108λ have been used to probe the milliarc s structure of the BL Lacertae objects AO 0235+164, 0735+178, BL Lac, 1749+701, Mk 421, and 3C 66A. Two sets of observations are reported, made in November 1978 and March 1979. AO 0235+164 and 0735+178 both showed structures consisting of a very bright, unresolved core and a jet-like component extending ∼5".4 10-3 along position angle ∼20° and ∼4".2 10-3 along position angle ∼45°, respectively. AO 0235+164 contained more than 98% of the total flux density within a diameter of ≲ 36" 10-3. BL Lac, 1749+701 and Mk 421 all showed evidence for a complex structure of several components, including an unresolved core. 3 C 66A was elongated along position angle ∼ -45°.

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