Proposal code

w511

Proposal title

Interstellar OH masers at milliarcsecond scale

The

Investigators and their

Affiliations

P.I. Horiuchi, S. NAO
Migenes, V. University of Guanajuato
Murata, Y. ISAS
Slysh, S. ASC, Russia

Proposal Abstract

The sizes of OH maser spots are sometimes found to be about 10 times smaller than the expected in the models of interstellar scattering. To study the nature of OH masers and ISM scattering we propose VSOP observations to image interstellar OH masers in W75N, NGC7538, and Orion-KL at 1665 MHz and 1710 MHz. The maps of the maser regions and images of individual maser spots will be produced with an angular resolution of 1 milliarcsec which is several times higher than the angular resolution available on the ground. Since observations with ground-only telescopes, toward the sources in this proposal, so far have only partially resolved OH maser spots, VSOP high angular resolution may provide the crucial opportunity to achieve our goal.

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.