First observations with the Effelsberg Radio Telescope at 7-mm wavelength. II - A survey of stars in the vibrationally excited J equals 1-0 SiO lines

Details First observations with the Effelsberg Radio Telescope at 7-mm wavelength. II - A survey of stars in the vibrationally excited J equals 1-0 SiO lines First observations with the Effelsberg Radio Telescope at 7-mm wavelength. II - A survey of stars in the vibrationally excited J equals 1-0 SiO lines

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86..392s&link_type=abstract

Astronomical Journal, vol. 86, Mar. 1981, p. 392-409.

Astronomy and Astrophysics

Astronomy

72

Emission Spectra, Masers, Radio Astronomy, Silicon Oxides, Stellar Radiation, Stellar Spectra, Late Stars, Line Spectra, Millimeter Waves, Radio Telescopes, Red Giant Stars, Stellar Envelopes, Stellar Luminosity, Stellar Motions, Supergiant Stars, Variable Stars

Scientific paper

High-resolution and high-sensitivity spectra are presented for 46 SiO masers in the J = 1 - 0 transitions of the υ = 1, υ = 2, and υ = 3 excited states. The emission is a complex blend of weak maser lines. Our sample is statistically complete to a distance of approximately 300 pc, but is sensitivity limited. The luminosity functions are the same for υ = 1 and υ = 2 regardless of their shape, but the υ = 1 line is, on the average, 1.4 times stronger than the υ = 2 line in the same star. A luminosity function corrected for incompleteness has been obtained using a new method. The SiO luminosity is not correlated with other stellar properties, which indicates that local conditions in the stellar atmospheres determine the maser intensity.

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