G305.8 - 0.2 water vapour source: A young object

Astronomy and Astrophysics – Astronomy

Scientific paper

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Protostars, Stellar Evolution, Water Masers, Early Stars, Infrared Astronomy Satellite, Silicon Oxides, Southern Sky

Scientific paper

Observations of water vapor and silicon monoxide masers were conducted in the direction of G305.8-0.2. No SiO maser emission above 7 Jy of flux density was detected. The short-time variability of the H20 maser together with the absence of compact radio continuum emission suggests that the excitation energy of the maser could originate from an O7-O9 protostar in its earlier evolutionary stages.

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