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| - Submillimeter vibrationally excited water emission from the peculiar red supergiant VY Canis Majoris
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| - Context.Vibrationally excited emission from the SiO and H 2O molecules probes the innermost circumstellar envelopes of oxygen-rich red giant and supergiant stars. VY CMa is the most prolific known emission source in these molecules. Aims.Observations were made to search for rotational lines in the lowest vibrationally excited state of H 2O. Methods.The APEX telescope was used for observations of H 2O lines at frequencies around 300 GHz. Results.Two vibrationally excited H 2O lines were detected, a third one could not be found. In one of the lines we find evidence for weak maser action, similar to known (sub)millimeter $u_2$ = 1 lines. We find that the other line's intensity is consistent with thermal excitation by the circumstellar infrared radiation field. Several SiO lines were detected together with the H 2O lines.
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