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J.E. Dickens, W.D. Langer, T. Velusamy (JPL/Caltech)
We have made observations to investigate evidence for infall-outflow interaction in the Young Stellar Object in B335 for the study of dynamic evolution in protostellar cores. We present recent data obtained with the Owens Valley Radio Observatory (OVRO) interferometer in the CS (J=2--1) transition to trace the full extent of the infall-outflow interaction region. We find that these observations reveal an obvious outflow component with lower velocity gas than that seen in CO. We have interpreted the CS observations as warm gas, released from icy grain mantles, which is entrained in the outflow via collisions with grains. Another interesting result of this study is that there is no obvious evidence for an infall or disk component for the CS emission, contrary to that suggested by the infall signatures reported from single-dish observations. To check the possibility that we have resolved out such an infall component, we have performed observations of this transition with the compact configuration at OVRO. Lack of an infall component has far-reaching consequences for the interpretation of infall based on line profiles with single-dish observations.
This research has been conducted at the Jet Propulsion Laboratory, California Institute of Technology with support from the National Aeronautics and Space Administration. OVRO is supported by a grant from the National Science Foundation. This work was performed while the first author held a National Research Council-JPL Research Associateship.
The author(s) of this abstract have provided an email address for comments about the abstract: james.dickens@jpl.nasa.gov