Proposal code

w505

Proposal title

Pair plasma dominance in the pc-scale jets of B1150+812 and B1213+350?

The

Investigators and their

Affiliations

P.I. Kouichi Hirotani National Astronomical Observatory, Tokyo, Japan
M.A. Pérez-Torres Istituto di Radioastronomia, Bologna, Italy
S. Kameno National Astronomical Observatory, Tokyo, Japan
J.M. Marcaide Universidad de Valencia, Spain

Proposal Abstract

We propose VSOP observations of the quasars B1150+812 and B1213+350 at 18cm, aimed at discriminating whether their parsec-scale jets are dominated by a ``normal plasma'' (protrons and relativistic electrons), or by a ``pair plasma'' (relativistic electrons and positrons). For this study, we need the synchrotron self-absorption spectra for the individual jet components of each quasar. Therefore, we also propose quasi-simultaneous observations with the VLBA (at 13, 6, 3.6, and 2 cm). While the multifrequency VLBA observations will allow us to accurately constrain the spectra of the sources, we also need to modelfit and decompose the components from 18 cm to 2 cm. Hence, VSOP observations at the longest wavelength, 18 cm, are mandatory.

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 AO5 proposals were submitted in February 2001, and information such as affiliations and contact details has changed for some proposers since that time.