Proposal code

v123

Proposal title

VSOP Continuum and Absorption Study for Cygnus A

The

Investigators and their

Affiliations

P.I. KAMENO Seiji NAO, Japan
INOUE Makoto NAO, Japan
FUJISAWA Kenta, Hirabayashi Hisashi ISAS, Japan
HAGIWARA Yoshiaki, KAWABE Ryouhei NRO, Japan
Baltasar Vila-Vilaro NRO, Japan

Proposal Abstract

We propose continuum and absorption line observations for the archetypal radio galaxy Cygnus A. Huge extinction at near infrared, soft X-ray absorption and HI absorptioin were found, and these support the `hidden quasar' hypothesis. Recombination absorption line observations will test this hypothesis. It will be a new probe close to core, which displays velocity field i.e. the central mass and/or gas infall. We also investigate physical condition of the jets. VSOP resolution of ~ 0.1 pc reveales inner structure of the acceleration region. Comparing two-band continuum images, we can obtain distribution of spectral index, which indicates energy transfer in jets. Precise jet configuration can be derived from accurate jet speed by two-epoch images and jet-to-counterjet brightness ratio R, thanks to high resolution and high quality images taken by VSOP.

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 AO1 proposals were submitted in November 1995, 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.