Absolute positions of SiO masers

Details Absolute positions of SiO masers Absolute positions of SiO masers

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99.1299w&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 99, April 1990, p. 1299-1308.

Astronomy and Astrophysics

Astronomy

40

Astrometry, Interstellar Masers, Silicon Oxides, Emission Spectra, Infrared Sources (Astronomy), Position (Location), Radio Sources (Astronomy), Signal To Noise Ratios, Very Large Array (Vla)

Scientific paper

The absolute radio positions of the v = 1, J = 2-1 SiO masers toward nine stars have been measured with typical position uncertainties of + or - 0.15 arcsec. The stars include the IR source IRc2 in Orion and R Aqr. The maser positions are compared with astrometrically determined stellar positions. For six of the stars, the stellar and maser positions differ by less than 0.35 arcsec. For VY CMa, the optical position is displaced by 1.1 arcsec from the maser.

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