Interpretation of the newly discovered submillimeter water maser

Details Interpretation of the newly discovered submillimeter water maser Interpretation of the newly discovered submillimeter water maser

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...352l...9n&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 352, March 20, 1990, p. L9-L12. Research supported by NASA.

Astronomy and Astrophysics

Astrophysics

29

Interstellar Masers, Late Stars, Star Formation, Stellar Envelopes, Submillimeter Waves, Water Masers, Interstellar Matter, Supergiant Stars

Scientific paper

The 10(29)-9(36)321 GHz water maser discovered recently by Menten et al. (1990) may be pumped collisionally under a wide range of physical conditions. This range of conditions is similar but not identical to that required to excite the well-studied 22 GHz water maser. The ratio of the observed 22 GHz and 321 GHz intersteller maser luminosities can be explained by collisional excitation within the same warm, dense gas. Collisional pumping in a circumstellar envelope can account for the observed 321 GHz maser emission in the supergiant star VY CMa.

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