Nearly simultaneous observations of vibrationally excited J = 1 - 0, J = 2 - 1, J = 3 - 2, and J = 4 - 3 SiO masers

Details Nearly simultaneous observations of vibrationally excited J = 1 - 0, J = 2 - 1, J = 3 - 2, and J = 4 - 3 SiO masers Nearly simultaneous observations of vibrationally excited J = 1 - 0, J = 2 - 1, J = 3 - 2, and J = 4 - 3 SiO masers

May 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...256l..55s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 256, May 15, 1982, p. L55-L59. Research supported by the University

Astronomy and Astrophysics

Astrophysics

23

Interstellar Masers, Silicon Oxides, Emission Spectra, Late Stars, Molecular Spectra, Orion Constellation

Scientific paper

A series of observations of the rotational transitions in a selection of late-type stars and Orion was carried out to clarify the processes of SiO maser phenomenon in order to model the physical mechanisms. The observations were made at frequencies of 86, 129, 172, 43, and 230 GHz and yielded velocity errors in the spectra of less than 0.3 km/sec. Correlated properties of the SiO masers were sought and peak flux and velocity transition data are presented for VY CMa, R Leo, W Hya, VX Sgr, Chi Cyg, R Cas, and Orion. Transitions, intensity ratios in the vibrational ladders, intensity ratios within a rotational state, maser chains within vibrational states with similar spectra, and the linear polarization of J = 1 - 0 and J = 2 - 1 masers are indicated to be necessarily included in any successful model of the SiO masers.

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