Molecular outflows and H2O masers - What type of connection?

Astronomy and Astrophysics – Astronomy

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Carbon Monoxide, Infrared Sources (Astronomy), Star Formation, Stellar Luminosity, Water Masers, Flux Density, Molecular Clouds, Stellar Mass Ejection, Stellar Models, Stellar Spectra

Scientific paper

The relationship between the (6(16) approaching 5(23))H2O maser emission and the CO molecular outflows found in star forming regions was investigated using observations in the 22 GHz water line of a sample of 142 confirmed CO outflows. Water maser emissions were detected in 41 sources out of 142, seven of which are new detections. All CO outflows in which masers were detected have high FIR luminosities. The mechanical luminosities of the CO outflows correlate with the H2O luminosities in a way similar to that proposed by the Elitzur et al. (1989) model of collisional shock excitation of H2O masers.

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