Proposal code

w327

Proposal title

AU-scale structure in the interstellar molecular clouds

The

Investigators and their

Affiliations

P.I. S. Horiuchi National Astronomical Observatory, Japan
V. Migenes Univ. of Guanajuato
Y. Murata ISAS, Japan
Z. Shen NAO, Japan

Proposal Abstract

We propose to observe three extragalactic compact sources, which positions are 10 degree above and below the galactic plane, to investigate the galactic absoption feature of OH molecules at 1655 MHz and 1667 MHz, and H_2CO molecules at 4830 MHz. Amang many strong extra-Galactic compact radio sources, 3C147, 3C111, NRAO150 is ideal to observe the absorption by galactic interstellar molecule by means of VLBI technique. High dynamic range and high resolution of the Space VLBI unable to image the absobed molecule lines in our Galaxy along the line of sight of these extra-Galactic sources. Higher resolution of the space baselines is needed for this study not only to determine the size on order of several AU, but also to detect the absorption with avoiding smearing of the absorption profile cause by large beam.

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.