Proposal code

w404

Proposal title

Sub-mas Structure and Motion in Lobe-dominated Quasars

The

Investigators and their

Affiliations

P.I. David H. Hough Trinity University, San Antonio, TX, USA
David W. Murphy JPL, Pasadena, CA, USA
Anthony C. S. Readhead Caltech, Pasadena, CA, USA
Rene C. Vermeulen NFRA, Dwingeloo, The Netherlands
David A. Wood, Jr. New Mexico Highlands University, Las Vegas, NM, USA

Proposal Abstract

We propose HALCA-plus-ground-array observations at 5 GHz to make AO4 images of the relatively strong nuclei in the lobe-dominated quasars 3C207 and 3C245. The superior beam size and shape as compared to ground-based VLBI will enable us to probe details of the exceedingly compact (<0.5 mas) structures known to exist in these objects. In particular, an exploration of jet alignment and bending in an inner ``transition zone'' on the parsec scale will be possible. The opportunity to study structural variations, including acceleration of jet components to superluminal speeds, may come with second-epoch observations during a future AO period. These investigations of compact morphology, jet curvature, and parsec-scale jet speeds will be of great value in testing AGN unification scenarios.

The full Cover Sheets (compressed post-script, typically 50kbytes) can be retrieved. Note that some proposals were reduced in extent by the Scientific Review Committee (e.g. by reducing the number of experiments), however the Cover Sheets contain the full proposal as submitted. Also note that AO4 proposals were submitted in October 2000, and information such as affiliations and contact details has changed for some proposers since that time.