Proposal code

w018

Proposal title

A morphological and spectral study of GPS galaxies and quasars.

The

Investigators and their

Affiliations

P.I. Snellen I.A.G. IoA, Cambridge, United Kingdom
Tschager W. Leiden Observatory, The Netherlands
Schilizzi R.T. J.I.V.E., The Netherlands
de Bruyn A.G. N.F.R.A., The Netherlands
Miley G.K., Röttgering H.J.A. Leiden Observatory, The Netherlands
van Langevelde H.J. J.I.V.E., The Netherlands
Fanti C., Fanti R. I.R.A., Bologna, Italy

Proposal Abstract

Sources with peaked radio spectra, the Compact Steep Spectrum (CSS) and Gigahertz Peaked Spectrum (GPS) sources, are almost certainly young objects, and therefore ideal for use in the study of the initial evolution of extragalactic radio sources. We are studying faint GPS and CSS sources and comparing the results with their bright counterparts to disentangle redshift and radio power eects. It is clearly of interest to examine these sources at a number of points along their evolutionary track using radio data with a range of angular resolution, limiting ux density and observing frequency. As a part of this programme, we were granted observing time with VSOP at 5 GHz for a `mini-survey' sample of 11 GPS sources (v085), and recently also 15 GHz observations with the VLBA and Eelsberg to obtain matched-beam spectral index information on the individual components in these objects. We now request 1.6 GHz observations of 8 of the sources with VSOP/HALCA which we will combine with ground-based matched-beam images at 5 GHz and convolved 15 GHz images to determine the spectra of optically thin and thick components and so derive the magnetic eld strength in individual components.

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 AO2 proposals were submitted in May 1998, 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.