Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.249p...7v&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, March 1, 1991, p. 7P-10P.
Astronomy and Astrophysics
Astronomy
16
Galactic Nuclei, Hydroxyl Emission, Infrared Stars, Interstellar Gas, Interstellar Masers, Scattering Functions, Milky Way Galaxy, Stellar Spectra, Very Long Base Interferometry, Very Long Baseline Array (Vlba)
Scientific paper
Short VLBI observations, using the new VLBA antennas have been obtained for four OH/IR stars within 15 arcmin of SgrA-asterisk, and it is concluded that these OH masers are severely resolved due to interstellar scattering at the wavelength of 18 cm. This leaves no doubt that the wavelength-squared dependence of the image size of SgrA-asterisk is also due to interstellar scattering. An accurate distance to the Galactic Center cannot be obtained from observations of OH/IR stars close to the Galactic Center.
Diamond Phil J.
van Langevelde Hubrecht Jan
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