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K. Gultekin, D.W. Koerner (U.Penn.), M.E. Ressler (JPL)
We present aperture synthesis mapping of a circumstellar disk around the high-mass protostellar source, L1206A. A contour map at 110 GHz reveals dust emission with peak flux density 32.5 ±3 mJy in a circular 2'' beam, and integrated intensity 62 ±6 mJy. The emission is elongated perpendicular to a bipolar reflection nebula with a nominal FWHM diameter of 2.3±.05'' (deconvolved), corresponding to 2300 AU at the 1 kpc distance estimated for the Lynds 1206 cloud. Visibility amplitudes are well-matched by those predicted from a model of dust radiation arising from a circumstellar disk. Preliminary model-fitting suggests the disk has outer radius 4000 AU and mass greater than 0.3M\odot.