Space-VLBI observations of OH masers

Details Space-VLBI observations of OH masers Space-VLBI observations of OH masers

2001-05-23

arxiv.org/abs/astro-ph/0105407v1

Astronomy and Astrophysics

Astrophysics

7 pages, 6 figures, proceedings of IAU206, newpasp.sty is included

Scientific paper

We report on the first space-VLBI observations of the OH masers in two main-line OH transitions at 1665 and 1667 MHz. The observations involved the space radio telescope on board the Japanese satellite HALCA and an array of ground radio telescopes. The maps of the maser region and images of individual maser spots were produced with an angular resolution of 1 mas, which is several times higher than the angular resolution available on the ground. The maser spots were only partly resolved and a lower limit to the brightness temperature 6x10^12 K was obtained. The masers seem to be located in the direction of low interstellar scattering.

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