Detection of the 3.5 millimeter J = 2-1, V = 2 transition of circumstellar SiO

Details Detection of the 3.5 millimeter J = 2-1, V = 2 transition of circumstellar SiO Detection of the 3.5 millimeter J = 2-1, V = 2 transition of circumstellar SiO

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...244l..99c&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 244, Mar. 1, 1981, p. L99-L102. Research supported by the Research C

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21

Interstellar Masers, Molecular Excitation, Silicon Oxides, Stellar Envelopes, Stellar Radiation, Variable Stars, Electron Transitions, Late Stars, Line Spectra, Millimeter Waves, Mira Variables, Stellar Models, Stellar Spectra

Scientific paper

The 3.5-mm J = 2-1, v = 2 transition of circumstellar SiO has been detected for the first time. This transition, from the Mira variable star R Cas, was about 50 times weaker than the corresponding 3.5 mm J = 2-1, v = 1 transition, both observed just prior to visual maximum. Two other SiO transitions from this star were also observed nearly simultaneously: these are the 7-mm J = 1-0, v = 1 and v = 2 lines. Six more SiO maser stars showed no evidence of 3.5-mm v = 2 emission during this observing period.

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