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N. J. Evans, Y. L. Shirley (Univ. Texas Austin), L. G. Mundy, M. Choi, L. Looney (Univ. Maryland), E. M. Gregersen (Cal Tech)
We have observed B335 and L1527, two Class 0 sources with strong evidence of protostellar collapse with the BIMA Interferometer at a wavelength of 3 mm. The observations provide a probe of the transition region between the inner envelopes and possible Keplerian disks. The overall goal is to trace the flow of matter during protostellar collapse from the extended envelope to the disk. In particular, the observations reported here will allow us to constrain the mass of disks at the earliest stages of star formation. We are using dust continuum emission to trace the matter. By combining single-dish submillimeter observations with millimeter interferometric observations, we can trace matter on a wide range of scales.