Interstellar scattering of OH/IR stars at the Galactic Centre
Open Access
- 1 March 1991
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 249 (1) , 7P-10P
- https://doi.org/10.1093/mnras/249.1.7p
Abstract
We present Short VLBI observations, using the new VLBA antennas have been obtained for four OH/IR stars within 15 arcmin of SgrA*, and it is concluded that these OH masers are severely resolved due to interstellar scattering at the wavelength λ of 18 cm. This leaves no doubt that the λ2 dependence of the image size of SgrA* is also due to interstellar scattering. We further conclude that an accurate distance to the Galactic Center cannot be obtained from observations of OH/IR stars close to the Galactic Center.Keywords
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