The evolution of stars between the AGB and planetary nebula phases was investigated by sensitive radio continuum observations of a sample of 21 evolved stars with high mass loss rates and extended circumstellar envelopes, in a search for newly formed compa

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RADIO FREQUENCY CONTINUUM EMISSION FROM EVOLVED STARSG.R. Knapp Department of Astrophysical Sciences Princeton University, Princeton, NJ 08544 gk@astro.princeton.edu P.F. Bowers United States Naval Observatory USNO/NRL Optical Interferometer Project, AD5 3450 Massachusetts Avenue, NW Washington, DC 20392-5420 bowers@sextans.lowell.edu K. Young and T.G. Phillips Caltech Submillimeter Observatory California Institute of Technology Pasadena, CA 91125 rtm@tacos.caltech.edu phillips@tacos.caltech.edu