Proposal code

w306

Proposal title

Brightness Temperature Measurements of 8 Strong Millimeter Radio Sources

The

Investigators and their

Affiliations

P.I. Zhi-Qiang Shen NAOJ, Japan
Makoto Inoue NAOJ, Japan
Seiji Kameno NAOJ, Japan
Shinji Horiuchi NAOJ, Japan

Proposal Abstract

We propose to observe 8 radio sources selected from the 3 millimeter VLBI survey sample with HALCA simultaneously at both 1.6 and 5.0 GHz. The aim is to make accurate measurements of the brightness temperatures in their cores. These measurements, complemented by the available VSOP results of the remaining 71 sources in the sample, will enable us to investigate the distribution of brightness temperature obtained from space VLBI. When compared to ground-VLBI measurements of this same sample but made at different wavelengths (e.g., 15, 22 and 86 GHz), this will help us to check theoretical limits on the maximum brightness temperature (such as inverse Compton scattering or equipartition hypothesis). A good addition to the proposed VSOP observations would be the study of individual source structure. For example, this would be the first VLBI image for gamma-ray-loud quasar J0957+5523. We expect to have four sources done during the AO3 period with the remaining four best observed in later 2000.

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.