Proposal code

w302

Proposal title

VSOP Observations of 2 Bl-Lac type objects: Mkn501, Mkn 421

The

Investigators and their

Affiliations

P.I. Gabriele Giovannini Istituto di Radioastronomia, Italy
L. Lara IAA - CSIC, Spain
W.D. Cotton N.R.A.O. - USA
T. Venturi Istituto di Radioastronomia, Italy

Proposal Abstract

We request VSOP observations at 6 and 18 cm of 2 nearby BL-Lac type objects: Mkn 501 and Mkn 421. Previous two epochs space VLBI observations at 18 cm of Mkn 501 show that the inner jet is centrally brightened at its beginning but becomes extended and limb brightened at ~ 8 mas from the core. Moreover a comparison between images obtained at different epochs suggests a proper motion with apparent velocity = 6.7c. The aim of requested observations are: - to derive the jet orientation and velocity; - to compare jet properties of low power sources and high power radio quasars; - to confirm the presence in the jet of a inner high velocity spine surrounded by a decelerating sheat; - to study possible jet oscillations due to orbital motion-precession effects or to hydrodynamic jet instabilities; - to investigate the correlation between the radio properties and the high frequency (X and gamma rays) emission

The full Cover Sheets (compressed post-script, typically 50kbytes) can be retrieved. Note that many 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 AO3 proposals were submitted in October 1999, and information such as affiliations and contact details has changed for some proposers since that time. The Cover Sheets (and the details on this page, which were derived from the Cover Sheets) may therefore have changed.