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Session AB - Astronomy and Space Physics.
MIXED session, Friday morning, October 05
SWR L1, Sid W. Richardson Building

[AB.004] Structure, Kinematics, Spectra, and Polarization of Parsec-scale Jets in Lobe-dominated Quasars

David Hough, Nickolaus Wing, Justin Linick (Trinity U.), Stephen Escobedo (San Antonio College and Trinity U.), Richard Porcas (MPIfR), Anton Zensus (MPIfR and NRAO), Rene Vermeulen (NFRA), Anthony Readhead (Caltech)

We report on recent centimeter-wavelength VLBI observations of parsec-scale jets in the nuclei of lobe-dominated quasars (LDQs). Our complete sample of 25 LDQs is drawn from the revised 3CR survey. Space VLBI observations of 3C263 at very high resolution show a transverse-resolved jet. Phase-referenced VLBA images of the extremely faint nuclei in 3C9, 3C14, 3C432, and 4C16.49 all exhibit one-sided parsec-scale jets that are well-aligned with kiloparsec-scale jets. Multiple-epoch VLBI images of 3C207, 3C208, 3C212, 3C245, 3C249.1, and 3C263 reveal superluminal motion in all these objects; in some objects, the jet trajectory is clearly non-linear and different jet components have different speeds. Spectral VLBA images of 3C207, 3C212, 3C263, and 3C334 show flat-spectrum cores and steep-spectrum jets. Polarization VLBA images of 3C207 and 3C275.1 show ordered magnetic field structures in the innermost jet regions. These results are generally consistent with relativistic jet models and active galaxy unification scenarios.

Part A of program listing