A new circumstellar maser - Si-30O

Details A new circumstellar maser - Si-30O A new circumstellar maser - Si-30O

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...215l...9b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 215, no. 2, May 1989, p. L9-L12. Research supported by CAICYT.

Astronomy and Astrophysics

Astrophysics

19

Interstellar Masers, Silicon Oxides, Stellar Evolution, Stellar Spectra, Abundance, Emission Spectra, Stellar Envelopes

Scientific paper

The detection of the Si-30O v = 0 J = 1-0 line in the evolved stars VY CMa, VX Sgr, IK Tau, and W Hya is reported. This emission has been identified as a new circumstellar maser, and it is shown to be similar to the Si-29O v = 0 maser in velocity structure and type of object in which it is observed, but to be about four times less intense. The results suggest that the pumping mechanisms of both molecules are similar and are related to nonlocal radiative interaction between different regions of the inner envelope.

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