Proposal code

v103

Proposal title

Non-scattered OH and H_2O masers

The

Investigators and their

Affiliations

P.I. V.I.Slysh Astro Space Center, Moscow, Russia
A.M.Dzura Astro Space Center, Moscow, Russia
I.E.Val'tts Astro Space Center, Moscow, Russia
V.I.Altunin JPL, USA
V. Migenes NAO, Japan

Proposal Abstract

Proposed observations consist of four experiments: simultaneous dual band observations of OH and H_2O masers in G34.26+0.15, G35.20-1.73, NGC6334N and Cepheus A. All the sources are situated in star forming regions that exibit also maser emission in methanol lines, but the latter 2 sources are characterized by strong circular polarization and very short time-scale variability (< 1 year). The sizes of maser spots on this sources, except NGC6334N, have been measured with VLBI techniques by Kemball et al. (1988) and Slysh et al. (1995). Their sizes were found to be about 10 times smaller than the expected scattering angle in the models of I.S. Scattering. It is possible the sources are seen through a "hole" in the scattering medium and were unresolved or partially resolved in those experiments. Therefore high angular resolution observations/images may reveal intrinsic OH and H_2O maser spots, not broadened by interstellar scattering.

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.