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Ronald Snell

Research Interests: Molecular Outflows

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The young stars that are forming in the dense molecular cloud cores have a significant impact on their surrounding cloud material. Another area of interest to me is the study of the hypersonic gas motions associated with these newly formed stars. Such motions are revealed by the presence of extraordinarily broad molecular emission lines. This hypersonic emission is believed to arise from an expanding shell of ambient gas accelerated in the bow shock of a highly collimated stellar/disk winds from the newly formed star. This "bipolar outflow" phenomenon is now believed to be a phase through which virtually every new-born star passes. This phenomenon may affect crucially the energy balance of molecular clouds and likely play a central role in the evolution of the stellar system. Observations at FCRAO have been important in understanding this "bipolar outflow" phenomenon. Below is a map of the redshifted (red) and blueshifted (blue) CO emission from the NGC 2071 regions. Two distinct bipolar molecular outflows are detected as well as possible mono-polar outflow. ___________________________________________________________________________________________________________________________________________________