1998A&A...338L..63D

We report new high resolution (0.6-1.7") images of GM Aur in the ¹²CO J=2->1 line and the 1.3 and 2.7mm continuum. The dust disk, located at the center of the CO disk, is resolved by the 0.6'' beam of the interferometer. We derive a minimum radius of ∼200AU, and a total mass (dust+gas) of about ∼0.025M_☉. Our CO observations also resolve the Keplerian rotation of the gas disk. Since the CO emission is optically thick, the CO data does not allow a disk mass measurement but we can estimate the dynamical mass of the system, i.e. the stellar mass, M_*=0.84±0.05x(D/140pc)M_☉ although a solution with a more inclined disk and lower stellar mass (∼0.6M_☉) is also possible.