The relative intensity and velocity of SiO J = 1-0, V = 1 and 2 masers

Details The relative intensity and velocity of SiO J = 1-0, V = 1 and 2 masers The relative intensity and velocity of SiO J = 1-0, V = 1 and 2 masers

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aj.....84.1349s&link_type=abstract

Astronomical Journal, vol. 84, Sept. 1979, p. 1349-1356.

Astronomy and Astrophysics

Astronomy

16

Electron Transitions, Interstellar Masers, Late Stars, Radial Velocity, Radiant Flux Density, Silicon Oxides, Astronomical Spectroscopy, Omicron Ceti Star, Stellar Spectra, Vibrational Spectra

Scientific paper

The SiO J = 1-0, v = 1 and 2 maser transitions were observed nearly simultaneously with accurate cross calibration in a sample of sources. The integrated and peak intensity of the two masers are comparable and many precise velocity agreements are seen in individual features. Broad emission plateaus (Snyder et al. 1978) are seen in both the v = 1 and 2 transitions. These results strongly suggest that the two masers share a common pump source and are spatially coincident in a spherical mass loss flow. A strong, variable feature at radial velocity of +5 km/s was observed in Orion which may indicate the presence of a second distinct source.

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