A 5 GHz Southern Hemisphere VLBI Survey of Compact Radio SOurces - I

Abstract

We report the results of a 5 GHz southern hemisphere VLBI survey of compact extragalactic radio sources. These observations were undertaken with the SHEVE array plus Shanghai station in November 1992. A sample of 22 sources was observed and images of 20 of them were obtained. Of the 20 sources imaged, 15 showed core-jet structure, one had a two-sided jet and 4 had only single compact cores. Eleven of the 16 core-jet (including one two-sided jet) sources show some evidence of bent jets. No compact doubles were found. A comparison with previous images and the temporal variability of the radio flux density showed evidence for superluminal motion in 4 of the sources. Five sources were high energy (>100 MeV) gamma-ray sources. Statistical analysis showed the dominance of highly polarized quasars among the detected gamma-ray sources, which emphasizes the importance of beaming effect in the gamma-ray emission.

39 pages including 7 ps figures and 5 tables, Latex, to appear in AJ

Cited by in corpus (28)

• First M87 Event Horizon Telescope Results. VII. Polarization of the Ring
• 1.3 mm Wavelength VLBI of Sagittarius A*: Detection of Time-Variable Emission on Event Horizon Scales
• TANAMI: Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry I. First-Epoch 8.4 GHz Images
• Helical jets in blazars. Interpretation of the multifrequency long-term variability of AO 0235+16
• Sub-Milliarcsecond Imaging of Quasars and Active Galactic Nuclei. II. Additional Sources
• The Radio Structure of High-Energy Peaked BL Lacertae Objects
• Spin temperatures and covering factors for HI 21-cm absorption in damped Lyman-alpha systems
• Resolving the inner parsec of the blazar J1924-2914 with the Event Horizon Telescope
• A 5-GHz Southern Hemisphere VLBI Survey of Compact Radio Sources - II
• Radio-Excess IRAS Galaxies: PMN/FSC Sample Selection
• A relativistic helical jet in the gamma-ray AGN 1156+295
• A Search for Intrinsic HI 21 cm and OH 18 cm Absorption Toward Compact Radio Sources
• The Extreme Scattering Event Toward PKS 1741-038: VLBI Images
• Relation between radio core length and black hole mass for active galactic nuclei
• High-frequency very long baseline interferometry studies of NRAO 530
• Multi-Frequency VLBI Observations of NRAO 530
• A Quasi-Periodic Modulation of the Radio Light Curve of the Blazar PKS B0048-097
• The evolution of cold neutral gas and the star formation history
• Two classes of radio flares in the blazar PKS 0420$-$014
• Multi-epoch VLBA observations of 3C 66A
• Extreme Superluminal Motion in the Curved Jet of PKS 1502+106
• Does a radio jet drive the massive multi-phase outflow in the ultra-luminous infrared galaxy IRAS 10565+2448?
• The Center of Activity in the CSS Superluminal Source 3C 138
• The radio structure of the $\gamma$-ray narrow-line Seyfert 1 galaxy SDSS J211852.96$-$073227.5
• Quasi-simultaneous five-frequency VLBA observations of PKS 0528+134
• Constraining the Flaring Region of Sagittarius A* By 1.3mm VLBI Measurements
• Multi-epoch, multi-frequency VLBI study of the parsec-scale jet in the blazar 3C 66A
• The milliarcsecond-scale jet in the quasar J1625+4134